| 1680000 | = | 1000 | x | ( | 1 | − | 250 | x | ) | × | 67 5 | × | 350 | × | 350 | + | 200000 | x | × | 1608 |
| Right side of the equation = | 1641500000 | x | ( | 1 | − | 250 | x | ) | + | 321600000 | x |
| 1680000 | = | 1641500000 | x | ( | 1 | − | 250 | x | ) | + | 321600000 | x |
| Right side of the equation = | 1641500000 | x | × | 1 | − | 1641500000 | x | × | 250 | x | + | 321600000 | x |