The economic order quantity $($EOQ$)$ calculation is made using the following formula.

EOQ$=Q=\sqrt[\phantom{2}]{\frac{2S{R}_{\text{a}\text{n}\text{n}\text{u}\text{a}\text{l}}}{H}}$

where $H=(h+r)C$ and $h=$ physical holding cost rate and $r=$ cost of money and $C=$ cost to purchase item.

In the Customer Responsiveness simulation $($a$.$k$.$a$.$ Miyaoka or Lead Time$)$ what is $"r"?$

$0\%$

$5\%$

$10\%$

$20\%$