Burget Clinic uses client-visits as its measure of activity. During July, the clinic budgeted for 2,100 client-visits, but its actual level of activity was 2,110 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for July: Data used in budgeting: Fixed element per month Variable element per client-visit Revenue... NONE $47.10 Personal expenses... $22,700 $16.90 Medical supplies... 1,600 6.50 Occupancy expenses... 6,900 1.50 Administrative expenses... 3,400 0.40 Total expenses.. $34600 $25.30 Actual results for July Revenue... $101,491 Personal expenses... $55,699 Medical supplies... $15,895 Occupancy expenses... $9,785 Administrative expenses... $4,424 The spending variance for medical supplies in July would be closest to