Assume that Casio Computer Company, LTD. sells handheld communication devices for $110 during August as a back-to-school special. The normal selling price is $160. The standard variable cost for each device is $60. Sales for August had been budgeted for 600,000 units nationwide; however, due to the slowdown in the economy, sales were only 550,000. Compute the revenue, sales price, sales volume, and net sales volume variances.