[The following information applies to the questions displayed below.] Archer Company Is a wholesaler of custom-bullt alr-conditioning units for commerclal bulldings. It gathered the following monthly data relating to units shipped and total shipping expense: Exercise 5A-4 Part 2 (Static) 2. Using the high-low method, estimate the cost formula for shipping expense. 4. What factors, other than the number of units shipped, are likely to affect the company's shipping expense? (You may select more than one answer. Slngle cllck the box with the question mark to produce a check mark for a correct answer and double cllck the box with the questlon mark to empty the box for a wrong answer. Any boxes left with a questlon mark will be automatically gracled as incorrect.) ? Sales commissions Trade discounts glven to repeat customers ? Express shipping to meet a deadline