On Saturday, June 30, BD Pool Supplies sold merchandise to E. Luang on account. The sales price was $5,100, and the cost of goods sold was $4,500. The sales revenue was recorded immediately, but the entry recording the cost of goods sold was dated Monday, July 2. As a result, net income for June was:

Overstated by $5,100.

Overstated by $4,500.

Overstated by $600.

Not affected, but the net income for July is understated.