text: s = sales\nc = commision\n\nc = s * (20/100) = .20s\n\nSo if you mean that he gets a base salary of $1,500 PLUS whatever he earns in commision, then\n\nPay = 1500 + .20s\n\nIf you mean that he gets paid 20% commision, and if the commision isn't at least 1500, then he gets 1500, then\n\nPay = 1500 OR .20s  , whichever is higher.\n\n\nIn this case, his commision (c) is\nc = .20 * 6550\nc = 1310\n\nSo 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.