$($a$)$ On March $2,$ Marin Company sold $$890,100$ of merchandise to Cullumber Company on account, terms $\frac{2}{10},\frac{n}{30}.$ The cos of the merchandise sold was $$546,300.$

$($b$)$ On March $6,$ Cullumber Company returned $$105,400$ of the merchandise purchased on March $2.$ The cost of the merchandise returned was $$62,600.$

$($c$)$ On March $12,$ Marin Company received the balance due from Cullumber Company.