The classic EOQ model is the simplest form which incorporates all the assumptions regarding uncertainties. Choose the cost components not included in this classic EOQ model but included in the extension models.

$(1).$ Ordering costs

$(2).$ Safety stock costs

$(3).$ Stock out costs

$(4).$ Internal storage costs

Group of answer choices

$(2)$

$(2)$ and $(3)$

$(1),(2),$ and $(3)$

None of the above