Please help this makes no sense, there's three parts to the question...

Required information [The following information applies to the questions displayed below] Tree Seedlings has the following current-year purchases and sales for its only product. Required: The company uses a perpetual inventory system. a. Determine the costs assigned to ending inventory and to cost of goods sold using FFFO. b. Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. c. Compute the gross profit for each method. tetermine the costs assigned to ending inventory and to cost of goods sold using FFFO. (1) Required information Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. 1. Required information Jane 30 c. Lompute tne gross prorit tor eacn metnod. Complete this question by entering your answers in the tabs below. Compute the gross profit for each method