Last year a bicycle cost $160 and a cycling helmet cost $40. This year the cost of the bicycle increased by 5%, and the cost of the helmet increased by 10%. The percent increase in the combined cost of the bicycle and the helmet is<spanclass=′latex−bold′>(A)</span>6%<spanclass=′latex−bold′>(B)</span>7%<spanclass=′latex−bold′>(C)</span>7.5%<spanclass=′latex−bold′>(D)</span>8%<spanclass=′latex−bold′>(E)</span>15%