Final answer:
The total cost of Kevin's order, which includes 5 hamburgers, 6 sodas, and an 8-dollar tax, is $22.50.
Step-by-step explanation:
To calculate the total cost of Kevin's order, we need to add the cost of the hamburgers, the cost of the sodas, and then include the tax on the order.
First, we find the total cost of the hamburgers:
5 hamburgers × $1.40 each = $7.00.
Next, we find the total cost of the sodas:
6 sodas × $1.25 each = $7.50.
Now, we add the cost of the hamburgers and the sodas together:
$7.00 + $7.50 = $14.50.
Finally, we add the tax:
$14.50 + $8.00 tax = $22.50.
So, the total cost of Kevin's order, including tax, is $22.50.