Block 1 of 1 Time remaining:00:5 4 of 18 Petra Company uses the average-cost inventory method. Its 2020 ending inventory was $80,000, but it would have been $120.000 if FIFO had been used. Thus if FIFO had been used, Petra's income before income taxes would have been $40.000 greater $40 000 less the same not determinable without the tax rate