Cengage Advantage Books: Introduction to Business Law 4th Edition by Timothy Koch, Jeffrey Beatty, Jeffrey Beatty, Susan Samuelson, Susan Samuelson

Exercise 16

Daniel and Annie signed a contract providing that Annie would sell craft beers to Daniel's grocery stores at a price of $20 per case. During negotiations, Daniel and Annie agreed that the price would go up to $22 per case once he had bought 1,000 cases. This provision never made it into the contract. After the contract had been signed, Daniel agreed to a price of $23 per case once volume exceeded 1,000 cases.
The contract had an integration provision but no modification clause. What price must Daniel pay for cases in excess of 1,000
(a) $20
(b) $22
(c) $23
(d) The contract is void because the terms are unclear.