At the beginning of the year, ChillerIce estimated that the company would produce 480 portable ice makers during the year (40 per month). Annual fixed costs were estimated at $600,000 ($50,000 per month), and estimated variable overhead costs were estimated at $500 per unit. The standard cost per unit was set at $3,450: Standard material cost $1,200 Standard labor cost 500 Standard overhead rate per unit 1,750 Total $3,450 During the year, the company experienced stiff competition and ended up producing and selling only 400 ice makers. Total annual budgeted production costs were $1,656,000 and actual production costs were $1,616,400.

Calculate the labor rate variance and efficiency variance.

Calculate the controllable overhead variance and volume overhead variance.

Show mw steps I am very confused.