$2.$ Consider the MRP model using the EOQ method of ordering. Express POR in terms of GR$,$ BI$,$ and EI and

write the equation in the space provided.

For the case when GR $>$ BI and POR $>$ NR$,$ let the POR be equal to K

For the case when GR $<$ BI$,$ if POR is applicable, let the POR be equal to M

For the case when GR $>$ BI and POR $=$ NR$,$ let the POR be equal to X

Note that K$,$ M$,$ and X are each $>=0.$ Also, GR$,$ BI$,$ and EI $>=0$

Express $($K $+$ M $$ X$)$ ONLY in terms of GR$,$ BI$,$ and EI$.$ NR should not be in this expression.