co hai cua hang ban nuoc ngot .cua hang thu nhat mot ngay ban duoc 11 chai sting, 3 chai 7up, 4 chai sua.con cua hang thu hai ban duoc 12 chai sua ,4 chai cam ,va 3 chai 7up.hai cua hang co gia ban giong nhau (sting 8000 dong ; 7up 6000 dong ; sua 5000 dong ; cam 6000 dong ) .hoicua hang thu nhat va thu hai kiem duoc bao nhieu tien , tiem nao ban duoc nhieu hon va it hon , tong so tien hai cua hang ban duoc la bao nhieu ?