Help with 11 and 12 please!!

Selma pays an invoice for an office supply order at the DMV on December 17. The net price on the order is $372.55. and the terms are 3/10, net 30. The date of the invoice is December 10. Patty pays an invoice for producing a safe driving video at the DMV on December 17. The net price on the order is $545.00. and the terms are 3/10. net 30. The date of the invoice is December 3. Find the total cash price Selma and Patty paid. Abraham is elected treasurer of his retirement community^'s social group. He receives an invoice for an order of new jigsaw puzzles with a net price of $212.75 and an invoice date of January 15. The terms of the invoice are 4/5 EOM. Abraham also receives an invoice for snacks and fruit punch with a net price of $58.93 and an invoice date of January 29. The terms of this invoice are 2/5 EOM, and since it is dated so near the end of the month, an extension is granted. Abraham makes both payments on February 7. What is the total cash price he pays