Onyx decor Company has prepared a static budget at the beginning of the month. At the end of the month, the following in formation has been retrieved from the records.

Static Budget

Sales volume: 1,000 per units: price $70 per unit

Variable expense: $32 per unit: fixed expenses $37,500 per month

Operting income: $500

Actual Results

Sales volume: 990 units: Price $74 per unit

Variable expense: $35 per unit: Fixed expenses: $ 33,000 per month

Operating income: $5,610

Calculate the sales volume variance for the fixed expenses. Please show work.