El Dorado Tire Company fired Bill Ballard, a sales executive. Ballard had a five-year contract with El Dorado but was fired after only two years of employment. Ballard sued El Dorado for breach of contract. El Dorado claimed that any damages due to breach of the contract should be mitigated because of Ballard’s failure to seek other employment after he was fired. El Dorado did not provide any proof showing the availability of comparable employment. Explain whether El Dorado is correct in its contention.