Contribution Margin Variance, Contribution Margin Volume Varlance, Sales Mix Varlance Haysbert Company provides management services for apartments and rental units. In general, Haysbert packages its services into two groups: basic and complete. The basic package includes advertising vacant units, showing potential renters through them, and collecting monthly rent and remitting it to the owner. The complete package adds maintenance of units and bookkeeping to the basic package. Packages are priced on a per-rental unit basis. Actual results from last year are as follows: Sales (rental units) 2,000 Selling price Variable expenses $85 Haysbert had budgeted the following amounts: Basic Complete 400 $300 $240 $140 Sales (rental units) Selling price Variable expenses Basic Complete 460 $290 $242 1,950 $145 $90