A customer wants to purchase a sweater from a store.

The original price of the sweater is $40.

The sweater is on sale for 20% off the original price.

A sales tax of 5% is applied after the discount.

What was the final price of the sweater?

A
$34.00

B
$30.00

C
$30.40

D
$33.60

please answer quick, doing a test