Help please

In its first month of operations, Literacy for the Illiterate opened a new bookstore and bought merchandise in the following order: (1) 340 units at 510 on January 1, (2) 580 units at 511 on January 8, and (3) 880 units at 512 on January 29. Assume 1,090 units are on hand at the end of the month. Calculate the cost of goods available for sale. ending inventory, and cost of goods sold under the (a) FIFO. (b) LIFO, and (c) weighted average cost flow assumptions. Assume a periodic inventory system is used. (Round your intermediate calculations to 2 decimal places.)