Please help me get the answer with solution in Question 4. Thank you!

Problem 23-7 (AICPA Adapted) Rice Company used FIFO. There were 8,000 units on January 1.costing P400,000. Historical cost Units purchased Units sold First quarter 410,000 Second quarter 550,000 7,000 7,500 Third quarter 425,000 8,500 7,300 Fourth quarter 630,000 6,500 8,200 9,000 7,000 The current cost per unit of inventory was P57 on January 1 and P71 on December 31. 1. What is the inventory on December 31 at current cost? a. 576,000 b. 585,000 C. 630,000 d. 639,000 2. What is the unrealized gain on inventory for the current year? a. 126,000 b. 54,000 C. 9,000 d. 0 3. In the income statement restated to current cost, what is the cost of goods sold for the current year? a. 1,920,000 b. 1,944,000 c. 2,100,000 d. 2,130,000 4. What is the realized holding gain on inventory for the current year? a. 345,000 b. 135,000 C. 230,000 d. 75,000 721