Amanufacturer of desk lamps has determined that the cost to produce xx units per month is given by c=0.2x^2+10,000.c = 0.2 x 2 + 10 , 000. how fast is cost per month changing when production is changing at the rate of 12 units per month and the production level is 80 units?

Kinc. has provided the following data for the month of may: inventories: beginning ending work in process $ 17,000 $ 12,000 finished goods $ 46,000 $ 50,000 additional information: direct materials $ 57,000 direct labor cost $ 87,000 manufacturing overhead cost incurred $ 63,000 manufacturing overhead cost applied to work in process $ 61,000 any underapplied or overapplied manufacturing overhead is closed out to cost of goods sold. the adjusted cost of goods sold that appears on the income statement for may is: