5 pts James Incorporated's flexible budget for June, based upon actual output, called for the use of 10,500 pounds of materials at a standard cost of $7.40 per pound. The Production Department actually used 10,700 pounds of materials costing $7.10 per pound during June. The materials quantity variance for James's June operations is: O $3,150 favorable. O $3,210 unfavorable. O $1,480 unfavorable. O $3,210 favorable