Exercise 13.29 Fowler Electranics produces colour plasma screens in its Windsor, Ontarlo, plant. The screens are then shipped to the company's plant In Detroit, Michigan, where they are incorporated into finished televisions. Although the Windsor plant never sells plasma screens to any other assembler, the market for them is competitive. The market price is $752 per screen. variable costs to manufacture the screens are $344. Fixed costs at the windsor plant are $1,933,000 per penod. The plant typically manufactures and ships 10,000 screens per period to the Detroit plant. Taxes in Canada amount to 30% of pretax income. The Canadian plant has total assets of$19,640,000 The Detroit plant incurs variable costs to complete the televisions of S118 per set (in addition to the cost of the screens). The Detroit plant's fixed costs amount to $3,926,000 per period. The 10,000 sets produced each period are sold for an average cr $2,523 each. The U.S, tax rate is 45% or pretax income. The u.s. plant has total assets of 529,120,000 All dollar amounts are arter exchange rate corrections. Determine the return on investment for each plant if the screens are transferred at variable cost. (Round answers to 2 decimal places, e.g. 25.25%. Show a negative answers preceded by a minus sign, eg 25.25 or parentheses, e.g. (25.25).) Windsor Detroit ROI at variable cost