Answer:
| Paul: | 4( | 130 | ) + 3( | 0 | ) + 2( | 250 | ) + 1( | 120 | ) = | 520 | + | 0 | + | 500 | + | 120 | = | 1140 |
| Rita: | 4( | 0 | ) + 3( | 500 | ) + 2( | 0 | ) + 1( | 0 | ) = | 0 | + | 1500 | + | 0 | + | 0 | = | 1500 |
| Sarah: | 4( | 150 | ) + 3( | 0 | ) + 2( | 250 | ) + 1( | 100 | ) = | 600 | + | 0 | + | 500 | + | 100 | = | 1200 |
| Tim: | 4( | 220 | ) + 3( | 0 | ) + 2( | 0 | ) + 1( | 280 | ) = | 880 | + | 0 | + | 0 | + | 280 | = | 1160 |