The charge that will be charged on debit card is:
$ 9.425
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:
[tex]\dfrac{4}{100}\times 0.75\\\\=0.03[/tex]
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
