Analyzing changes in unit costs

The costs of materials consumed in producing good units in the Forming Department of Thomas Company were $6,160 and $11,550 for September and October, respectively. The number of equivalent units produced in September and October was 770 tons, and 1,650 tons, respectively. Evaluate the change in the cost of materials between the two months.

Round all answers to the nearest whole cent.

Energy cost per ton, September	$fill in the blank 1
Energy cost per ton, October	$fill in the blank 2

The cost of energy has appeared to

decreaseincrease

by $fill in the blank 4 per ton between September and October.