The income of a company for a year on a variable costing basis is $85 000 and on an absorption costing basis is $73 000. Fixed costs per unit were the same in both the prior and current year ($1.50 per unit). What was the change in inventory over the year? Select one: Decease of 12 000 units Increase of 10 000 units Decease of 8 000 units Decrease of 10 000 units