In a suit by a general contractor to recover for extra work it performed on two public works contracts, the trial court's judgment in favor of the contractor is affirmed, where: 1) as to one contract, the defendant school district eventually issued written change orders authorizing the extra work; 2) as to another contract, the contractor's bid was based on misleading plans and specifications issued by the district; and 3) the trial court correctly determined that the contractor and the performance bond issuer were entitled to recover attorney's fees pursuant to the performance bonds.