Five quarts of oil and an oil filter cost $20.35. however, with a coupon, these items may be purchased for $4.43 less. what is the final cost of the oil and filter?

Hey there :)

5 quarts of oil and an oil filter - $20.35
With couple - $4.43 less
Final cost?

We subtract 4.43 from $20.35
Why? That's the expected amount [ without a coupon ]

 20.35
-  4.43
  15.92

The final cost will be $15.92