Cosmos Company on July $15$ sells merchandise on account to Cajon Co$.$ for $$6,000,$ terms $2/10,$ n$/30.$ On July $20$ Cajon Co$.$ returns merchandise worth $$1,000$ to Cosmos Company. On July $24$ payment is received from Cajon Co$.$ for the balance due. What is the amount of cash received?

Select one:

a$.$ $$4,800$

b$.$ $$5,000$

c$.$ $$6,000$

d$.$ $$4,900$