please answer this right i always get wrong answers

Montoure Company uses a periodic inventory system. It entered into the following calendar-year purchases and sales transaction's. requirea: 1. Compute cost of goods available for sale and the number of units available for sale. 2. Compute the number of units in ending inventory. Required information [The following information applies to the questions displayed below.] Warnerwoods Compariy uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. 7. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 125 units from beginning inventory, 255 units from the March 5 purchase, 105 units from the March 18 purchase, and 145 units from the March 25 purchase. Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar. 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, ( c ) weighted average, and (d) specific identification. For specific identification, units sold consist of 615 units from beginning inventory, 315 from the February 10 purchase, 215 from the March 13 purchase, 65 from the August 21 purchase, and 280 from the September 5 purchase. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount. 4. Compute gross profit earned by the company for each of the four costing methods. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount. Montoure Company uses a periodic inventory system. It entered into the following calendar-year purchases and sales transaction's. requirea: 1. Compute cost of goods available for sale and the number of units available for sale. 2. Compute the number of units in ending inventory. Required information [The following information applies to the questions displayed below.] Warnerwoods Compariy uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. 7. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 125 units from beginning inventory, 255 units from the March 5 purchase, 105 units from the March 18 purchase, and 145 units from the March 25 purchase. Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar. 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, ( c ) weighted average, and (d) specific identification. For specific identification, units sold consist of 615 units from beginning inventory, 315 from the February 10 purchase, 215 from the March 13 purchase, 65 from the August 21 purchase, and 280 from the September 5 purchase. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount. 4. Compute gross profit earned by the company for each of the four costing methods. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount