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Suppose a jar of orange marmalade that is ultimately sold to a customer at The Corner Store is produced by the following production process:
| Name of company | Revenues | Cost of purchased inputs |
| Citrus Growers | $0.75 | $0.00 |
| Mildura Jam Company | $2.00 | $0.75 |
| The Corner Shop | $2.50 | $2.00 |
What is the sum of the value added of all the firms?