A farmer bought 749 sheeps. He sold 700 of them for the price paid for the 749 sheep. The remaining 49 sheep were sold at the same price per head as the other 700. Based on the cost, the percent gain on the entire transaction is:<spanclass=′latex−bold′>(A)</span>6.5<spanclass=′latex−bold′>(B)</span>6.75<spanclass=′latex−bold′>(C)</span>7<spanclass=′latex−bold′>(D)</span>7.5<spanclass=′latex−bold′>(E)</span>8