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Required 1. At April 30, the store manager needs to know the store's gross profit under both FIFO and weighted-average cost. Supply this information. Johnson uses the periodic inventory syste 2. What caused the FIFO and weighted-average cost gross profit figures to differ? Requirement 1. At April 30, the store manager needs to know the store's gross profit under both FIFO and weighted-average cost. Supply this information. Johnson uses the periodic 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