Coolaid Corporation uses the perpetual inventory method. On May $1,$ it purchased $$22,000$ of inventory, terms $\frac{2}{10},\frac{n}{30}.$ On May $3,$ Coolaid returned goods that cost $$2,000.$ On May $9,$ Coolaid paid the supplier. On May $9,$ the company should credit

A $$ purchase discounts for $$440$

B $$ inventory for $$440$

C $$ inventory for $$400$

D $$ purchase discounts for $$400$