Mccubbin Corporation is considering two alternatives: A and B. Costs associated with the alternatives are listed below:

	Alternative A	Alternative B
Materials costs	$35,000	$57,000
Processing costs	$36,000	$57,000
Equipment rental	$12,000	$28,000
Occupancy costs	$19,000	$19,000

Are the materials costs and processing costs relevant in the choice between alternatives A and B? (Ignore the equipment rental and occupancy costs in this question.)

A.		Neither materials costs nor processing costs are relevant
B.		Both materials costs and processing costs are relevant
C.		Only processing costs are relevant
D.		Only materials costs are relevant