A food truck sells salads for \$6.50$6.50dollar sign, 6, point, 50 each and drinks for \$2.00$2.00dollar sign, 2, point, 00 each. the food truck's revenue from selling a total of 209209209 salads and drinks in one day was \$836.50$836.50dollar sign, 836, point, 50. how many salads were sold that day?