La connessione di partite formate la punto iniziale per què di saldare. In a contract, a fixed sum may have been agreed, which means that no more or less will be paid when the subject matter of the contract is finalized. In another contract, fixed unit prices may be agreed and then a final sum is paid based on the number of units produced multiplied by the unit price. In both of these cases, the parties have agreed on the price in advance. The contractor has the risk of increased costs, while the builder misses out on possible savings.