The following table contains the monthly usage and unit costs for a random sample of $15$ items from a list of $2,000$ inventory items at a health care facility.

Item Unit Cost Monthly Usage

K$3410200$

K$3525600$

K$3636150$

M$101625$

M$202080$

Z$4580700$

F$1420300$

F$9530800$

F$992060$

D$4510550$

D$481290$

D$5215110$

D$5740120$

N$083040$

P$0516500$