Please help!

Nittany Compsny uses a periodic inventory system. At the end of the annual accounting period, December 31 of the current year, the accounting records provided the following information for product t: Compute ending inventory and cost of goods sold for the current year under FFO, LFO, and average cost inventory costing methods. Note: Round "Average cost per unit" to 2 decimal places and final answers to nearest whole doliar amount