Bianca = <<12.5=12.5>>12.5 hours
Celeste 2 * 12.5 = <<2*12.5=25>>25 hours
McClain = 25 - 8.5 = <<25-8.5=16.5>>16.5 hours
Total + 12.5 + 25 + 16.5 = <<+12.5+25+16.5=54>>54 hours
54 hours * 60 minutes = <<54*60=3240>>3240 minutes.
Bianca, Celeste and McClain worked a total of 3240 minutes last weekend.
#### 3240