If the sales mix (in 25 above) shifts to two units of small for every two units of large, then the weighted average contribution margin will: Increase stay the same O decrease be indeterminable O Cannot be determined with the given information If the sales mix (in 25 above) shifts to two units of small for every two units of large, then the weighted average contribution margin will: Increase stay the same O decrease be indeterminable O Cannot be determined with the given information