Answer: The required amount of sales tax is $2.97.
Step-by-step explanation: Given that Cassie wants to buy a pair of shoes for $26.50 and a shirt for $9.50 and the sales tax rate is 8.25%.
We are to find the amount of sales tax on Cassie's purchase.
The total amount of purchase is given by

Therefore, the amount of sales tax is given by

Thus, the required amount of sales tax is $2.97.