Compute gross profit earned by the company for each of the four costing methods. for specific identification, the march 9 sale consisted of 135 units from beginning inventory and 265 units from the march 5 purchase; the march 29 sale consisted of 115 units from the march 18 purchase and 155 units from the march 25 purchase.

Which one of the following statements is true? ddt does not prevent disease from passing from agricultural animals to humans. cost was a major factor in the united states government's decision to ban ddt. many african governments concluded that the potential long-term health effects of ddt were not as serious as the immediate problem of insect control. ddt cannot accumulate in the fat of animals. the ddt ban in the united states has made it very difficult to control agricultural insect pests.