ensure that the proper mix of input chemicals is achieved and that evaporation is controlled. Loss of output and efficiency may result if the controls are not effective. The standard cost of producing a 500-liter batch of Charger Power is $135. The standard materials mix and related standard cost of each chemical used in a 500 liter batch are: chemical usage variations at the end of the production period. What is the total material yield variance? Multiple Choice $429.50. $139.50. $568.50. $415.00