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7*50+16*10+38*5+120*2+350*1=
=350gr+160gr+190gr+240gr+350gr= (dodam ułatwiając obliczenia)
=700gr+350gr+240gr=
=1050+240= 1290gr= 12zł 90gr
odp. Razem jest to 12zł i 90gr.
PS.
7*50=350
16*10=160
38*5=190
120*2=240
350*1=350