B is correct, please help me find A & C.

The U.S. Airfilter company has hired you as a supply chain consultant. The company makes air filters for residential heating and air- conditioning systems. These filters are made in a single plant located in Louisville, Kentucky, in the United States. They are distributed to retailers through wholesale centers in 100 locations in the United States, Canada, and Europe. You have collected the following data relating to the value of Inventory in the U.S. Airfilter supply chain: QUARTER 1 QUARTER 3 QUARTER 4 (JANUARY QUARTER 2 (JULY (OCTOBER THROUGH (APRIL THROUGH THROUGH THROUGH MARCH) JUNE) SEPTEMBER) DECEMBER) All amounts in millions of U.S. dollars Sales (total quarter): United states Canada Europe 354 98 65 358 148 40 530 123 44 378 153 21 362 383 493 393 67 45 69 84 Cost of goods sold (total quarter) Raw materials at the Louisville plant (end-of-quarter) Work-in-process and finished goods at the Louisville plant (end-of-quarter) Distribution center inventory (end-of-quarter): United states Canada Europe 183 199 127 239 46 17 5 28 16 6 46 24 5 59 16 7 a. What is the average Inventory turnover for the firm? (Round your answer to 3 decimal places.) Average inventory turnover b. If you were given the assignment to increase Inventory turnover, what would you focus on? Reduce the amount of Inventory or increase sales or both Increase the amount of Inventory or increase sales or both Reduce the amount of Inventory or reduce sales or both c. The company reported that it used $500M worth of raw material during the year. On average, how many weeks of supply of raw material are on hand at the factory? (Round your answer to 2 decimal places.) Weeks of raw material supply