Biff has a job cleaning tables at the Big Belly Beef Burger Buffet. He earns $50 per night, guaranteed. He also earns a $3 tip for every person at the tables he cleans, but has to give half the tips to the dishwasher. On Wednesday he cleaned 10 tables with 4 people at each. Create and solve a BEDMAS equation to determine Biff’s earnings for that night.