Kay's Auto Products budgeted sales of 32.400 units of product B, assuming that the company would have 18 percent of 180.000 units sold in a particular market. The actual results were 28.730 units, based on a 13 percent share of a total market of 221,000 units. The budgeted contribution margin is $6 per unit. Required: Compute the sales activity variance, and break it down into market share and industry volume. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values. Omit the "$" sign in your response.)