I don't understand what I am doing wrong.

\\( \\operatorname{Jan} 1^{5 t} \\) Jan 10th 165units@9.00 Jan 10th sold 125@25.00 \\( \\operatorname{Jan} 20^{\\text {th }} 110 @ 8.00 \\) Jan 25 th sold 125@25.00 \\( \\operatorname{San} 30^{\\text {th }} 250 @ 7.50 \\) Laker Company reported the following January purchases and sales data for its only product. For specific identification, ending inventory consists of 250 units from the January 30 purchase, 5 units from the January 20 purchase, and 20 units from beginning inventory. sume the periodic inventory system is used. equired: 1. Compute gross profit for the month of January for Laker Company for the four inventory methods using the periodic inventory system. 2. Which method yields the highest gross profit? 3. Does gross profit using weighted average fall between that using FIFO and LIFO? 4. If costs were rising instead of falling, which method would yield the highest gross profit