Please show me a step-by-step answer.

The loading space of cargo planes is divided into front, middle, and back, and the loading limits for each part are shown in the table below. The types and characteristics of cargo waiting to be loaded are shown in the table below. Each cargo can be loaded in installments. From the airline's point of view, what cargoes should be accepted and how much to maximize the total fare? Also, which part of the cargo plane should I load the received cargo? Formulate the LP model to solve the above