Maintian linearity

A manager is trying to optimize their supplier choice decision. They have two suppliers and can order from either or both suppliers. The manager requires 3,000 total units ordered. Current contracts with both suppliers require a minimum order quantity of 2,000 units. If the manager orders less than 2,000 units from a supplier then they incur a $3 penalty per each unit less than 2,000 that they order. Each unit from supplier 1 costs $2.50 and incurs a $0.75 delivery charge. Each unit from supplier 2 costs $3.50 but does not incur a delivery charge. Build a model that the manager can use to minimize the total cost of meeting their required units by ordering from the suppliers. Enter the correct optimal total cost