Billy Davidson operates Billy's Worm Farm in Mississippi. Davidson raises worms for fishing. He sells a box of 20 worms for $12.60. Davidson has invested $400,000 in the worm farm. He had hoped to earn a 24% annual rate of return (net income divided by total assets), which works out to a 2% monthly return on his investment. After looking at the farm's bank balance, Davidson fears he is not achieving this return. To evaluate the farm's performance, he prepared the following production cost report. The Finished Goods Inventory is zero because the worms ship out as soon as they reach the required size. Monthly operating expenses total $2,000 (in addition to the costs below).