5 is alone and 6-8 are together. please help me with all!

5. The units of an item available for sale during the year were as follows: Jan. Inventory Apr. 4 Purchase May 20 Purchase Oct 30 Purchase 18 units at $36 25 units at $32 15 units at $30 20 units at $38 There are 45 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the ending inventory cost using LIFO. Use the information below to answer the following questions 6-8. The following units of an inventory item were available for sale during the year: Beginning inventory First purchase Second purchase Third purchase 20 units at $45 15 units at SS2 35 units at $56 25 units at $50 The firm uses the periodic inventory system. During the year, 55 units of the item were sold. 6. The value of ending inventory using FIFO is a. S1.960 b. $1,850 c. $2,090 d. S2,059 7. The value of ending inventory using LIFO is a $1,960 b. 52,090 c. $1.850 d. 52,059 8. The value of ending inventory rounded to the nearest dollar using the Average Cost Method is a $1,850 b. S2,059 c. $1,960 d. $2,090