text: try this one..? a sales man has a guaranteed salary minimum of 1500/month. he is paid a 20% commision on all sales what is his pay in a month where sales are 6550. can some one show me the formula as well s = sales c = commision  c = s * (20/100) = .20s  so if you mean that he gets a base salary of $1,500 plus whatever he earns in commision, then  pay = 1500 + .20s  if you mean that he gets paid 20% commision, and if the commision isn't at least 1500, then he gets 1500, then  pay = 1500 or .20s  , whichever is higher.   in this case, his commision (c) is c = .20 * 6550 c = 1310  so his pay is either $1,500 (since 1310 is less than 1500) or $2,810 (1310+1500) depending one which your looking for. the phrasing of your question leaves doubt as to which you're looking for.