Answer:
To calculate the total cost of the dinner bill including sales tax, we can use the following steps:
Step 1: Calculate the sales tax amount
The sales tax is 8% of the original bill amount, so we can calculate it as follows:
Sales tax = 8% of $15.35
Sales tax = 0.08 x $15.35
Sales tax = $1.23
Step 2: Calculate the total cost
To calculate the total cost of the dinner bill including sales tax, we need to add the sales tax amount to the original bill amount:
Total cost = $15.35 + $1.23
Total cost = $16.58
Therefore, the total cost of the dinner bill including an 8% sales tax is $16.58