On April $2,$ merchandise costing $$15,400$ reaches the retailer located in New Orleans, Lous siana. The invoice is dated March $22$ and has terms of $8/10$ EOM. The invoice is paid on April $10.$

$($a$)$ How much should be remitted?

$($b$)$ If the merchandise is shipped FOB New Orleans, Louisiana, charges reversed, with transportation charges of $$300,$ how much should be remitted?