Răspuns:
3000 - 1972 = 1028 au ramas in primul magazin
1972 - 573 = 1399 a vandut al doilea magazin
3000 - 1399 = 1601 au ramas in al doilea magazin
1399 + 1426 = 2825 a vandut al treilea magazin
3000 - 2825 = 175 au ramas in al treilea magazin
1028 + 1601 + 175 = 4399 au ramas in total