I need help getting the cash

(a) On March 2, Marin Company sold $914.000 of merchandise to Cullumber Company on account, terms 3/10, n/30. The cost of the merchandise sold was $592,400. (b) On March 6, Cullumber Company returned $104,600 of the merchandise purchased on March 2. The cost of the merchandise returned was $64,400. (c) On March 12, Marin Company received the balance due from Cullumber Company