Becca is a purchasing agent for Cable & Wire Corporation

Becca is a purchasing agent for Cable & Wire Corporation. Doyle, a Cable & Wire corporate officer, gives Becca written authority to buy for the firm as much copper as necessary. The next day, Doyle calls Becca and tells her to buy only a certain quantity of copper and no more. Becca shows the written authority to Earthbound Resources, Inc., and enters into a contract to buy more than the quantity specified by Doyle. Earthbound Resources ships the order to Cable & Wire. Is Cable & Wire liable to Earthbound Resources under the contract? Is Becca liable? In each case, if so, why? If not, why not??