If agreed upon terms for payment of an invoice are $"\frac{3}{7},\frac{2}{15},\frac{n}{30}",$ what is the last date on which the invoice should be paid to take advantage of the $2\%$ discount if the invoice is dated May $12$ th$?$

$\sqrt[A]{?}$

If the invoice amount is $$8,865,$ what amount would be required to settle the invoice if paid on the date determined above?

A