1. At May 31, the store manager needs to know the store's gross profit under both FIFO and weighted-average cost. Supply this information. Bryant uses the periodic inventory system. 2. What caused the FIFO and weighted-average cost gross profit figures to differ? Requirement 1. At May 31, the store manager needs to know the store's gross profit under both FIFO and weighted-average cost. Supply this information. Bryant uses the periodic inventory system. (Round all calculations to one decimal place.) Requirement 2. What caused the FIFO and weighted-average cost gross profit figures to differ? Gross profit under FIFO and weighted-average cost differ because inventory costs during the period