Mady has an infinite number of balls and empty boxes available to her. the empty boxes, each capable of holding four balls, are arranged in a row from left to right. at the first step, she places a ball in the first box of the row. at each subsequent step, she places a ball in the first box of the row that still has room for a ball and empties any previous boxes. how many balls in total are in the boxes as a result of mady's $2010$th step?