A daycare charges a base fee of 333 dollars plus 0. 500. 500, point, 50 dollars per minute for late (after closing time) pick-ups. Albin had to pay 10. 5010. 5010, point, 50 dollars for a late pick-up. Albin uses the equation, 10. 50=0. 50a+310. 50=0. 50a+310, point, 50, equals, 0, point, 50, a, plus, 3 to represent the situation. What does the variable aaa represent in the equation?.