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

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.

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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:

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:

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

Sara notes:

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?

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

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:

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

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:

Yes, yes, and yes.

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