What is the most likely system acquisition method: Commercial Software, Custom Software, ERP, for each of the following situations? A plumbing supply company with 12 employees that sells standard products to wholesale customers in a local community needs a system to manage its affairs. A major oil company with diverse holdings, complex oil leases, and esoteric accounting practices needs a system that can coordinate its many enterprises. A municipal government needs a system that complies with standard government accounting practices but can be integrated with other existing systems.