Answer:
The answer is: Graincorp's production is not included in the GDP
Step-by-step explanation:
The GDP includes the total production of final and legal goods and services. Since Graincorp produces corn syrup, which is later used by Crunchy's to produce breakfast cereal, we can consider corn syrup as an intermediate good. Intermediate goods are not included in the GDP.
The selling price of Crunchy's cereal should already include the value of all its inputs (including corn syrup).