TB 03-83 A cost formula is always valid outside the r... A cost formula is always valid outside the relevant range of activity. True or False True False SB Gaston Company is a merchandising Gaston Company is a merchandising firm. Next month, the company expects to sell 800 units. The following data describe the company's revenue and cost structure: Selling price per unit Sales commission $40 5% Purchase price (cost) per unit $18 Advertising expense $4.000 per month Administrative expense $4,500 per month plus 15% of sales Assume that all activity mentioned in this problem is within the relevant range. 8 03-45 What is the expected total administrative ex... at is the expected total administrative expense next month? Multiple Choice $14,900 $13,300 $9,300 $4,800