Which is the objective function in the following problem?

Apex Motors wants to build as many cars and motorbikes as possible, on a budget. The company plans to spend at most $ $75000$sign, $75000$ and use at least $320$ workers to build cars and motorbikes.

$8000$ C plus $5500$ M less or equal than $75000$ represents the number of cars CC and motorbikes M the company can build by spending at most $ $75000$sign, $75000.$

The company plans to spend at most $ $75000$sign, $75000$ and use at least $320$ workers to build cars and motorbikes.

Apex Motors wants to build as many cars and motorbikes as possible.

The objective function cannot be determined from the information provided.

$8000$ C plus $5500$ M less or equal than $75000$