Cardinal uses the high-low method of estimating costs. Cardinal had total costs of $25,000 at its lowest level of activity, when 5,000 units were sold. When, at its highest level of activity, sales equaled 10,000 units, total costs were $39,000. Cardinal would estimate variable cost per unit as:a. $3.52

b. $3.30

c. $2.60

d. $3.93

Intoxicated and not aware of the consequences, umberto agrees to a two-year cell-phone service contract with wander talk, inc., at more than the average market price. this contract is not enforceable because the contract clearly favors wander talk. not enforceable because umberto was intoxicated enough to lack mental capacity when he agreed to it. not enforceable because contracting parties can change their minds. enforceable.