You make both rocking chairs and bar stools. you charge $100 for every rocking chair and $40 for every bar stool. which expression represents your income if you sell r rocking chairs and b bar stools? a) 60(r - b) b) 100r + 40b c) 100b + 40r d) 140(r + b) e) (100 +r) + (40 + b)