a) A manufacturer of video-game cartridges sells each cartridge for RM22.65. The manufacturing costs of each cartridge are RM16.25. Monthly fixed costs are RM12000. During the first month of sales of a new game, how many cartridges must be sold in order for the manufacturer to break-even?

b) A total of $10,000 was invested in two business ventures, A and B. At the end of the first year, A and B yielded returns of 6%and 5.75 %, respectively, on the original investments. How was the original amount allocated if the total amount earned was $588.75?