Answer & Solution
$$\eqalign{ & = 45000\times\frac{8}{100}\times\frac{5}{12} \cr & = 1500 \cr & \therefore \text{Required profit} \cr & = \text{Rs. }\left(1500\times433\right) \cr & = \text{Rs. 649500} \cr} $$

| Total number if mobile phones sold = 45000 | |
| Month | Ratio (A : B) |
| July | 8 : 7 |
| August | 4 : 5 |
| September | 3 : 2 |
| October | 7 : 5 |
| November | 7 : 8 |
| December | 7 : 9 |