On July 31, Tractor Supplies sold merchandise to J. Robson on account. The sales price was $8,400, and the cost of goods sold was $6,300. The sales revenue was recorded immediately, but the entry recording the cost of goods sold was dated August 2. As a result, net income for July was
| overstated by $2,100. |
| overstated by $6,300. |
| not affected, but the net income for August is understated. |
| overstated by $8,400. |