$27$

$2\mathrm{.}5$ points

a model which describes a situation in which one order is placed for a product is a

single $-$ period inventory model

demand model

quantity model

jit model

$2\mathrm{.}5$ points

TCO is

inventory costs involved in a product

the combination of all supplier costs involved in a product

the combination of all costs involved in a product

partial costs involved in a product