please help

Baxter Bakers is trying to decide whether it should keep its existing bread-making machine or purchase a new one that has technological advantages (which translate into cost savings) over the existing machine. Information on each machine follows: Refer to Baxter Bakers. The $5,000 of annuat operating costs that are common to both the old and the new machine are an example of a(n) Select one: 3. future avoidable cost b. irrelevant cost cisunk cost do onnortinizy enst