?????????????????????? "persentage" ??????????????
me thank yu tri tu sae...him sell
30 at 1.25*kost
40*1.2, 60*1.1, & 70*0.9
$ take in=(30*1.25)+(40*1.2)+(60*1.1)+(70*0.9)
=37.5+48+66+63
sum=214.5...how much munee him take in
divide bi 200...1.0725
so him make 7.25% profit