(1) Capacity to buy and sell is regulated by the general law concerning capacity to contract and to transfer and acquire property.
(2) If necessaries are sold to an infant or to a person who, because of mental incapacity or drunkenness, is incompetent to contract, he or she must pay a reasonable price for the goods.
(3) In this section:
"necessaries" means goods suitable to the condition and life of the infant or other person and to his or her actual requirements at the time of the sale and delivery.