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

### Instruction:
 比安卡上周末工作了12.5小时。塞莱斯特工作的时间是比安卡的两倍，而麦克莱恩比塞莱斯特少工作了8.5小时。这三个人总共工作了多少分钟？


### Response:
 塞莱斯特: 12.5*2 = <<12.5*2=25>>25小时
麦克莱恩: 25-8.5 = <<25-8.5=16.5>>16.5小时
总共小时 = 12.5+25+16.5 = <<12.5+25+16.5=54>>54小时
总共分钟 = 54*60 = <<54*60=3240>>3240分钟
比安卡、塞莱斯特和麦克莱恩上周末总共工作了3240分钟。