George Heinrich yearly uses $1500$ of a certain subassembly part that has an annual holding cost of $$45$ per unit. Each order placed costs George $$150.$ Each part costs $$10$ and supplier providing the part has a capacity of $70$ units per order. Which of the following represents the best identification of the key elements in the problem?

Objective Function: total cost $|$ Decision Variable: the order quantity $|$ Parameters: demand $(1500),$ holding cost $(45),$ purchase cost $($$$10)|$ Constraints: supplier capacity $(70)$

Objective Function: total cost $|$ Decision Variable: the order quantity $|$ Parameters: demand $(1500),$ holding cost $(45),$ purchase cost $($$$10),$ ordering $co{s}_1($$$150)|$ Constraints: supplier capacity $(70)$

Objective Function: total profit $|$ Decision Variable: the order quantity $|$ Parameters: demand $(1500),$ holding cost $(45),$ purchase cost $($$$10),$ ordering cost $($$$150)|$ Constraints: there are no constraints

Objective Function: total cost $|$ Decision Variable: the order quantity $|$ Parameters: demand $(1500),$ holding cost $(45),$ purchase cost $($$$10),$ ordering cost $($$$150)|$ Constraints: there are no constraints