John’s Construction has three projects under way. Each projectrequires a regular supply of gravel, which can be obtained fromthree quarries. Shipping costs differ from location to location,and are summarized in the table.
| From: | Job 1 | Job 2 | Job 3 | Tonnage allowance |
| Quarry A | $9 | $8 | $7 | 1500 |
| Quarry B | $7 | $11 | $6 | 1750 |
| Quarry C | $4 | $3 | $12 | 2750 |
| Job Requirements (tonnes) | 2000 | 3000 | 1000 | 6000 |
Formulate a transportation model (but do not attempt to solveit) which could be used to determine the amount of gravel to beshipped from each quarry to the various job sites.
