Kid Adventures Company projected current year sales of 3,600 swing sets at a unit sale price of $225.00. Actual current year sales were 3,300 units at $215.00 per unit. Actual variable costs, budgeted at $166.00 per unit, totaled $175.00 per unit. Budgeted fixed costs totaled $122,000 while actual fixed costs amounted to $118,000. What is the sales volume variance for operating income? answer has to be favorable / unfavorable variance (please show your work)