Edward Taylor purchase two shirts for $17.95 and $27.50, a jacket for $94.20 and $12.30 each. The state tax rate is 8.5 percent. What is the total amount of tax on her purchase?

First, we need to calculate the total cost of all the items before tax.

Total cost of shirts = $17.95 + $27.50 = $45.45
Total cost of jackets = $94.20 + $12.30 = $106.50

Total cost before tax = $45.45 + $106.50 = $151.95

Now, let's calculate the total amount of tax on the purchase:

Tax amount = 8.5% of $151.95 = 0.085 * $151.95 = $12.92

Therefore, the total amount of tax on her purchase is $12.92.