1. At June 30, the store manager needs to know the store's gross profit under both FIFO and weighted-average cost. Supply this information. Fimpton uses the periodic inventory system. 2. What caused the FIFO and weighted-average cost gross profit figures to ciffer? Requirement 2. What caused the FIFO and weighted-average cost gross profit figures to dilfer? during the period. Gross profit under FIFO and weighted-average cost differ because inventory costs