Supplier A charges $$5\mathrm{.}00$ per unit. Supplier B charges $$2200$ per order plus $$2\mathrm{.}00$ for each unit ordered. Drysdale also has the option to buy $x$ from Supplier $C$ that charges $$4\mathrm{.}00$ per unit, but requires buyers to pay for a minimum of $500$ units $($even if they require less than $500).$

Select all true statements about sourcing Component $x.$ Plotting the graph is recommended.

Supplier $C$ is the optimal supplier when buying $450$ units

Supplier B is the optimal supplier when buying $80$ units

Supplier A is the optimal supplier when buying $9000$ units

When buying $1100$ units, there are multiple optimal Suppliers to choose from