The inventory plan for a material is given by Figure P$3\mathrm{.}9.$ Use Table $3\mathrm{.}3$ from the chapter

and find the following unit costs for the six units of stock used for JJ:

$($a$)$ Original

$($b$)$ Last

$($c$)$ Current $.$

$($d$)$ Lead$-$time replacement

$($e$)$ Delivery

$($f$)$ Money$-$out$-$of$-$pocket