the chart is used for all 3. any help?

Number of Units Unit Cost Sales Price Beginning Inventory Jul. 1 150 $21 Sold Jul. 5 120 $36 225 27 Purchased Jul. 10 Sold Jul. 15 180 39 Purchased Jul. 25 210 33 Ending Inventory Jul. 31 285 Question 15 Using FIFO inventory method what is the value of the ending inventory? SHOW YOUR CALCULATIONS Question 16 Using LIFO inventory method what is the value of the ending inventory? SHOW YOUR CALCULATIONS | Question 17 Assuming sales are $11,340, [i.e., (120 x $36) + (180 x $39)], what is the gross margin? (for both FIFO and LIFO) (show calculations for credit) igate