Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 乔纳买了6个菠萝，每个菠萝3美元。每个菠萝可以切成12个菠萝圈。他以每个5美元的价格卖出4个菠萝圈。乔纳赚了多少利润？


### Response:
 6个 x $3 = $18
乔纳花费了$18买了6个菠萝。
他能切出6个 x 12个 = 72个菠萝圈。
所以，乔纳能做出72个/4个 = 18套菠萝圈。
因此，乔纳能赚到18套 x $5 = $90。
因此，他的利润是$90 - $18 = $72。