Sandra wants to buy some sweets. She saved $10 for this purpose. Her mother gave her an additional $4, and her father twice as much as her mother. One candy costs $0.5, and one jelly bean $0.2. She wants to buy 14 candies and 20 jelly beans. How much money will she be left with after the purchase? Let's think first. Chain of thought:
Sandra's father gave her $4 * 2 = $8. So Sandra has in total $8 + $4 + $10 = $22. She wants 14 candies, so she is going to pay 14 candies * $0.50 / candy = $7 for them. She wants also 20 jellybeans, and they're going to cost 20 jellybeans * $0.20 / jellybean = $4. So after the purchase, she will be left with $22 - $4 - $7 = $11.
Therefore, the answer is 11.