Healthfood store ordered 15 cases of food supplements from Nature's Wonder with a list price of $290.80 each at trade discount rate of 20%, 10%. They received an invoice dated May 4, with payment terms 2/10, 1/20, n/30. (a) If Healthfood pay the full amount on May 16, how much should they pay? Expres your answer in 2 decimal places. (b) Healthfood received another invoice from Nature's Wonder (with the same payment terms i.e. 2/10, 1/20, n/30), dated June 5 in the amount of $6,848. If they make a partial payment of $3000 on June 13, how much would they have to pay o June 21 to settle the invoice? Assume the supplier accepts cash discounts on par payments. Express your answer in 2 decimal places