You buy a shirt that is originally $32 and is 15% off with a 5.6% sales tax. What is your final cost?

First find the sale price.

32 * 15% =

32 *.15 = 4.80

That's the discount. So the sale price is

32 - 4.80 = 27.20

Now add in sales tax

27.20 * 5.6% =

27.20 *.056 = 1.52

This is the sales tax. Now add it to the sale price for the final price.

27.20 + 1.52 = $28.72