1. You are billed for a product costing $512.74. If you pay the bill in cash, you'll receive a 6.38% cash payment discount. How much should you send to pay the bill in full?

2. The list price for a stereo is $1,445.25. If the trade discounts are 4/1, what is the net cost for the stereo?

3. If the trade discounts are listed as 4/2/8, what would be the single discount rate?

Round the percent to two decimal places.