3 kg struguri....5 kg mandarine....44 lei | × 2
5 kg struguri....10 kg mandarine....80 lei
6 kg struguri....10 kg mandarine....88 lei
5 kg struguri....10 kg mandarine.....80 lei
1 kg struguri....------------------------....8 lei
8 × 3 = 24 lei....5 kg mandarine....44 lei
5 kg mandarine....44 - 24 = 20 lei
1 kg mandarine....20 : 5 = 4 lei