During the audit of inventory, you note that the client had generated substantial cost and material variances. The client explains that many of the variances were due to irregular production schedules, heavy overtime for the summer period, and lighter production during other times of the year. The controller has allocated the variances (all negative) to Finished Goods and Work in Process Inventory, based on the relative proportion of each inventory category. Comment on the appropriateness of the allocation method used by the controller.