ronnie is correct - each man will normally do no less than £170, but they get paid £60 or more.
For example, last Friday the big cheese and myself cleaned £386 - we work at the same speed so its fair to say we both cleaned £193 of windows.
£193 x 33% = £63.69
now, do I pay the additional £3.69? No, I may be a Scotsman but I'm not mean, I bumped it up to £70 and totalled up for the week. I also buy his lunch for him. That may sound like I'm being soft but really when you break it down, even if I have spent £15 on diesel for the day then he has still made me an additional £100 more than what I have done.
Anyone who employs long term will understand that if they are worth keeping then they are worth that bit extra.