Question

You purchase 9.25 gallons of gasoline at $3.15/gallon. You also buy gum ($1.10) and

windshield wiper fluid ($4.97). The state has a food tax of 4% and you give the clerk $30.00
cash. You pay the rest with your debit card. How much is charged to your debit card?

Answer 1

$5.25

Explanation:

Cost of gasoline

• 9.25 gallons at $3.15 per gallon:

⇒ 9.25 × $3.15 = $29.1375

Cost of gum

$1.10 plus 4% food tax:

⇒ $1.10 × 1.04 = $1.144

Total cost of purchases

Gasoline + gum + Windshield wiper fluid

⇒ $29.1375 + $1.144 + $4.97 = $35.2515 = $35.25 (nearest cent)

If $30.00 was paid by cash and the rest was paid for by debit card:

Debit card charge = $35.25 - $30.00 = $5.25

Answer 2

• $ 5.25 is charged to debit card

Explanation:

Add 4% food tax:

• 1.1*1.04 =
• 1.14 (rounded)

Total amount of purchase is:

• 9.25*3.15 + 1.14 + 4.97 =
• 35.25

Subtract $30 paid in cash:

• 35.25 - 30 =
• 5.25