28% marge 1,95 verlies op verzending 70% v.d. sales Product A: 5% marge 6,30 verlies op verzending Product B: 28% marge 6,30 verlies op verzending 55% v.d. sales 45% v.d. sales 30% v.d. sales 75% v.d. sales 25% v.d. sales Marketing budget = 7,5% van de omzet?