Prepare the journal entries for the following transactions:

May $1$st $-$ Sold $6$ units of inventory to Peter Parker. The sales price was $$60$ per unit and the cost of the units was $$40$ per unit. The sale was on account under terms $2/10,$ n$/45.(2$ entries: sales & cost of goods sold$)$

May $6$th $$ Peter Parker returned two of the units.

May $9$th $-$ Collected the amount due on accounts receivable from Peter Parker.