Your total cost would be $8.48.
You are charged $0.06 for ever dollar spent. 0.06 x 8 = 0.48
The answer i.e. total cost of Shirt = $ 8.48
Given Price of shirt =$ 8.00
Given Sales tax = 6 %
i.e. 6 % of Price of shirt
So Sales tax on shirt
Total cost = Price of shirt + Sales Tax on shirt
=$ 8.00+ $0.48
why can't you?