During the grand opening of the new pizza parlor, Steve was hired to give out free movie tickets to customers. On Friday, he started with a box of tickets, and he distributed 0.50 of the box; on Saturday, he distributed of what was left; on Sunday, he distributed 0.25 of the remaining amount; on Monday, he distributed of what was left; and on Tuesday, he distributed of what remained. At the end of the 5 days, he had 60 tickets left. Determine how many tickets Steve had when he began to give them away.