Assume a European company that manufactures decorative fountain pens. The firm is trying to decide whether or not to expand its facilities. Currently, its fixed costs are $750,000 per month, and its average variable costs are $1.25 per pen. If the firm expands, its fixed costs will increase by $350,000 per month but its average variable costs will fall to $0.75 per pen. a. Write out the formula for the firm's current (short run) total cost TC(q), and its (short run) total cost TC(q) if it expands, with q measures the number of pens per month. b. Suppose the firm has a monthly volume of 600,000 pens. Should it expand? What about if the firm expects its volume to increase to 800,000 pens a month