1 carte=2 pixuri
1 caiet =1 pix-1000
5 pixuri......3 carti......12 caiete...45500
5 pixuri......6 pixuri....12 pixuri -12000.....45500
5pixuri+6pixuri+12pixuri=45500+12000
23 pixuri=57500
1 pix=57500:23=2500
1 carte=2x2500=5000
1 caiet=2500-1000=1500 R:1 pix =2500 lei
1 carte= 5000lei
1 caiet=1500lei