a merchant plans to sell two models of mp3 players at costs of $250 and $300. the $250 model yields a profit of $25 per unit and the $300 model yields a profit of $40 per unit. the merchant estimates that the total monthly demand will not exceed 280 units. the merchant does not want to invest more than $77,500 in inventory for these products. what is the optimal inventory level for each model

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Acompany that makes shopping carts for supermarkets and other stores recently purchased some new equipment that reduces the labor content of the jobs needed to produce the shopping carts. prior to buying the new equipment, the company used 6 workers, who produced an average of 79 carts per hour. workers receive $16 per hour, and machine coast was $49 per hour. with the new equipment, it was possible to transfer one of the workers to another department, and equipment cost increased by $11 per hour while output increased by four carts per hour. a) compute the multifactor productivity (mfp) (labor plus equipment) under the prior to buying the new equipment. the mfp (carts/$) = (round to 4 decimal places). b) compute the productivity changes between the prior to and after buying the new equipment. the productivity growth = % (round to 2 decimal places)