Question

You purchase 8.5 gallons of gasoline at $2.55/gallon. You also buy gum ($0.75) and windshield wiper fluid ($6.97). The state has a food tax of 4% and you give the clerk $20.00 cash and ask for the rest to be charged to your debit card. How much is charged to your debit card?

Answer 1

$2.55 * 8.5 = $21.68 gas
$0.75 * 4% = $0.03+$0.75 = $0.78 gum

$21.68 + $0.78 + $6.97 = $29.43
$29.43- $20.00 = $9.43 is chraged to your debit card

Answer 2

The charge that will be charged on debit card is:

$ 9.425

Explanation:

Cost of 1 gallon of gasoline is: $ 2.55

Hence, cost of 8.5 gallons of gasoline is: $ (2.55×8.5)

= $ 21.675

Cost of gum=$ 0.75

cost of windshield wiper fluid is: $ 6.97

Total cost of items= $ (21.675+0.75+6.97)

= $ 29.395

Also there is a food tax of 4%

Hence, the cost paid on items as tax is:

`(4)/(100)* 0.75\\\\=0.03`

Total cost of items including tax is: $ (29.395+0.03)

= $ 29.425

Now it is given that $ 20 has been paid as a tax.

Hence, the amount that will be charged to debit card is:

Total amount-Amount paid as cash.

= 29.425-20

= $ 9.425