500 ml= 0,5 l apa - o sticla
luni: s-au vandut 150 sticle : 150•0,5= 75 l apa
marti: 250 sticle: 250•0,5 =125 l apa
miercuri: 200 sticle :200•0,5=100 l apa
joi: 300 sticle: 300•0,5=150 l apa
vineri: 250 sticle: 250•0,5=125 l apa
in total : 150+250+200+300+250=1150 sticle de apa = 1150•0,5=575 l apa