For performing the plumbing upgrades for Alice while she incorporates Bill's business, they have satisfied each other's _________NEEDS_______ without the exchange of money.
This satisfaction of needs by the exchange of services is a trade by barter. The barter system enables Bill, who is a professional plumber, to upgrade the plumbing system at Alice's house. In payment for the plumbing service, Alice can incorporate Bill's plumbing business.
Thus, the exchange of services satisfies each other's needs without the payment of cash.
Learn more: https://brainly.com/question/21851512