Final answer:
The total cost of the shirt, including sales tax, is $9.01.
Step-by-step explanation:
To calculate the total cost of the shirt including sales tax, we need to multiply the original price of the shirt by the sales tax rate and add it to the original price. In this case, the original price of the shirt is $8.50 and the sales tax rate is 6%.
Sales tax amount = (6/100) * $8.50 = $0.51
Total cost = $8.50 + $0.51 = $9.01.
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