Level 3 A shop had a promotion on chips. Each packet of chips was sold for $2.80. 5 packets of chips were sold for $13.30. Neave wanted to buy 14 packets of chips for his class party. What was the least amount of money he had to pay?
Level 3 Esther spent $49.60 on muffins which costs $3.10 each. For every 3 muffins bought, she received one free muffin. How many muffins did she buy altogether?
Level 3
Ken had 147 boxes of pens. There were 24 pens in each box. He sold all pens at $2 each. How much money did he collect from the sale of the pens?