Sara and Erin Foster are here to help you figure out 'WTF' you just spent your money on

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Sara and Erin Foster are proof that in today's world, you can have it all – a sharp-witted sense of humor, a career on your own terms and stand-out beauty that ties it all together.

But the Foster sisters' secret to always looking top-notch, staying on-trend and doing it effortlessly is perhaps one that we've all always known – there's always a deal to be had if you look hard enough.

SEE ALSO: Millennials aren't spending money like their parents did

As Erin says, "When we hear sale or deal, you have us!"

The sisters have done it all when it comes to trying to get a deal, from buying a tweed coat on layaway (only to donate it to Goodwill when it was finally paid off years later because, let's be honest, how long can you really stay in love with the same seasonal tweed jacket?) to paying for laser hair removal on credit (beauty is pain, and so is spending money.)

Recently, the two sisters paired up with RetailMeNot, a savings destination accessible via website or free mobile app, to create a video series for the company's new program entitled "WTF Did I Just Spend My Money On?"

Check out the sisters crushing it on set below:

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Sara and Erin Foster RetailMeNot
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Sara and Erin Foster RetailMeNot

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

Sara and Erin Foster on set at a RetailMeNot shoot

Photo credit: Startraks / Sara Jaye Weiss

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The program aims to educate (with a humorous angle, of course) viewers on ways to save on what we deem our spending necessities and non-negotiables, whether it be beauty routines, happy hours or food cravings.

If you find yourself asking that question out loud almost daily (okay, daily), we're with you in solidarity.

Watch the hilarious video here:


The Foster sisters both agree that how your expenses add is up is sometimes quite "shocking," as Erin explained:

"What's crazy is how it adds up, how something that's $5.99, $8.99, $24, $22, it always comes out to $500! You don't even realize how it adds up."

And we're not just talking about clothing and weekly shopping trips.

Sara notes:

"It's overwhelming to furnish an apartment or a house, and every little bit helps...it's not just clothes, it's anything that you really need...it's great to make it more accessible to have more things that you want to have."

Just as small spending sprees here and there add up, so do small bouts of savings.

The number one expense that consistently shocks both of them the most?

"The grocery store."

One of Erin's solutions is to shamelessly order more expensive in-store products online for much cheaper:

"I was at Whole Foods and I was buying my probiotics and I was standing there with my boyfriend and he's like '$60 for probiotics? That's insane!'... so I ended up buying it online for $23 and I was like, 'that's a huge difference!'"

Also on the sisters' list of sneaky expenses? Parking expenses.

And don't forget taxes, as Erin jokingly asked, "Does Donald Trump have a good plan for that?"

Valid question that we all still seem to have an unclear answer to.

Both sisters agree that though bagging (no pun intended) a good deal is important, no one has the time to find out about every good sale and deal ahead of time, as Sara points out:

"I do everything on the fly, I don't have time to be searching all around for the best deals, so for there to be sort of a one-stop-shop, one place where it can happen in that moment, where I can be in line...and while I'm waiting, to be able to pull up on my phone the discount card or what is actually on sale and to just hand my phone and do it right there, that's like a mother's dream."

It truly is a dream, especially when, as Erin elaborates:

"Sometimes you'll buy something and you don't realize until later that you had the discount available."

How many times have we all heard about a great deal one of our friends scored and not found out about it until after the promotion was already over?

Thanks to RetailMeNot, that won't ever have to be an issue again.

So whether you're in the market for a new outfit for Friday night or seriously need that $5 morning latte tomorrow, there's no reason to spend more than you need to.

In the words of Erin Foster:

"Life is expensive and when it comes to shopping, I don't want to pay full price anymore, because you don't have to."

Yes, yes, and yes.

RELATED: 8 money-saving online shopping hacks

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Money-saving online shopping hacks
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Money-saving online shopping hacks

1. Clear your browser history

Some retailers might sneakily increase prices based on your browsing patterns and demand - so make sure to always clear your history and cookies before shopping! 

Photo credit: Shutterstock

2. Use an alternate email address

When you log in to a retailer's site with a new email address, retailers will often welcome you as a new customer with exciting new promotions and discounts. 

Photo credit: Shutterstock

3. Note price changes throughout the week

Another pro tip: Prices and deals can fluctuate based on the day of the week. For instance, if you're purchasing a flight, monitor prices for around a week to see if they take a dip on any particular day before purchasing. 

Photo credit: Shutterstock

4. Let items linger in your cart

Here's a hack: Add items to your cart, but let them sit for 24 hours before purchasing. The retailer might attempt to lure you back with additional discounts.

Photo credit: Shutterstock

5. Check out multiple sites

Do some research! Don't settle for the first price you see - poke around on a search engine and find the best deal. 

Photo credit: Shutterstock

6. Bargain with customer service

Use customer service to your advantage. If you ask (politely!) about an expired coupon, you'll often find yourself pleasantly surprised by an extension or new code! 

Photo credit: Shutterstock

7. Don't purchase impulsively

Try this shopping hack - don't buy that shiny, new toy right away. Step away for a few hours, and if you find yourself itching to go back and click 'purchase', then you know you won't regret your investment!

Photo credit: FogStock

8. Avoid shipping fees

Take advantage of free shipping! If you are a few dollars below the free shipping price point, add a low-cost filler item you need anyway (like socks!) and make the math work out in your favor. 

Photo credit: Alamy

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