All production costs have been steadily rising in the Donner Company for several periods. The company maintains large work in process inventories. Donner Company's cost per equivalent unit computed using the FIFO method would be the same as that computed under the weighted-average method. higher than that computed under the weighted-average method. lower than that computed under the weighted-average method. could be lower than, the same as, or higher than that computed under the weighted-average method