A company manufactures three different products: X$,$ Y$,$ and Z$.$ The annual demand for each product is as follows:

Product X: $15,000$ units

Product Y: $20,000$ units

Product Z: $25,000$ units

The production setup cost per order is $$1,000,$ and the holding cost per unit per year is $$7$ for Product X$,$ $$9$ for Product Y$,$ and $$6$ for Product Z$.$ Calculate the total annual inventory holding cost for all three products.