D&B Ice Cream budgeted sales of 153,504 units of flavor C, assuming that the company would have 18 percent of 852,800 units sold in a particular market. The actual results were 136,050 units, based ona 15 percent share of a total market of 907,000 units. The budgeted contribution margin is $4.60 per unit. Required Compute the sales activity variance, and break it down into market share and industry volume. (Indicate the effect of each variance by selecting "F for favorable, or "Ufor unfavorable. If there is no effect, do not select either option.) Sales activity variance Market share Industry volume