A company that sells electrical appliances wants to determine how many color TVs and VCRs to stock. The cost of purchasing a color TV for the company is $$300,$ and the cost of purchasing a VCR is $$200.$ One color TV requires $3$ square meters of storage space, and one VCR requires $1$ square meter of storage space. One color TV charge is $$150,$ one VCR charge is $$100.$ Write the target programming model that will find out how many color TVs and VCRs to order.