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?

Net profit=$86

Explanation:

This can be expressed as;

Net profit=Earnings-Total buying price-Expenses

where;

1. Earnings=Total earnings from Soft drinks sale+Total earnings from ice cream sale

Total earnings from soft drinks sale = (100*1) = $100

Total earnings from ice cream sale = (90*1.5) = $135

Earnings=100+135=$235

2. Total buying price=Total expense from buying of Soft drinks+Total expense from buying of ice cream

Total expense from buying of Soft drinks = (0.5*100) = 50

Total expense from buying of ice cream = (75/100) * 90=67.50

Total buying price = (50+67.50) = $117.50

3. Expenses=$31.50

Replacing;

Net profit=235-117.50-31.50=$86

Net profit=$86