Răspuns:
role → 25/100·120=25·120:100=30
120-30=90 pret de vanzare
trotineta → 25/100·260=25·260:100=65
260-65=195
patine → 25/100·200=25·200:100=50
200-50=150
90+195+50=335 reducerea
120+250+200=570 pretul total inainte de reducere
570-335=235 economia facuta