12. Brad sells ice cream and soft drinks at outdoor festivals. He buys soft drinks for 50 cents per can and ice cream bars for $75 per hundred. He marks up all items by 100 percent selling the drinks for $1.00 and ice cream bars for $1.50. One day he sold 100 cans of soft drinks and 90 ice cream bars. His expenses totaled $31.50. What was his net profit?