CPA Accounting Services contracts to buy goods from Office Supplies, Inc. (OSI). When OSI delivers the goods, CPA wrongfully refuses to accept them. OSI files a suit against CPA. OSI can recover damages equal to the difference between the contract price and the market price

when OSI filed a suit against CPA

at the time the contract was made.

when OSI learned of the breach.

at the time and place of tender.