Burford Company produces a gasoline additive, Gas Gain. This product increases engine efficiency and improves gasoline mileage through more complete combustion.
Careful controls are required during the production process to ensure that the proper mix of input chemicals is achieved and that evaporation is controlled. If the controls are not effective, there can be loss of output and efficiency.
The standard material cost of producing a 500-liter batch of Gas Gain is $135. The standard materials mix and related standard cost of each chemical used in a 500-liter batch are as follow:

The quantities of chemicals purchased and used during the current production period are shown in the following schedule. A total of 136 batches of Gas Gain were manufactured during the current production period. The company determines its cost and chemical usage variations at the end of each production period.

Required:
(1) Calculate purchase price variances for each chemical.
(2) Compute the materials mix and yield variances.

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Standard Input liters Standard Quantity Cost Chemical Echol -f )_colterer Total Cost $.200 425 150 S 40.00 Benz CT-40 100 250 42.50 37.50 15 $135.00 Quantity Total Quantity Used PriceLiters 26 800 12 660 37 400 7 140 $19,665 84 000 Purchased Purchase Chemical Echol Protex Benz СТ-40 (liters) 25 000 13 000 40 000 7 500 85 500 5,365 6,240 5,840 2