Suppose a December 6 100,000 units Winners in @ $7 $ 700,000 26 400,000 units @ 6 2,400,000 Vancouver, BC ended November 2019 with 800,000 units of merchandise that cost an average of $8 each. Suppose the store then sold 600,000 units for $5.0 million during December. Further, assume the store made two large purchases during December as follows: a) On December 31, the store manager needs to know the store's gross profit under both FIFO and weighted average cost. Supply this information. Winners uses the periodic inventory system. b) What caused the FIFO and weighted average cost gross profit figures to differ