In a claim for contractual damages based on loss of profit, the plaintiff bears the onus to identify, quantify and prove all saved expenses that must be deducted from the contract price to establish actual damages. Comprehensive disclosure of operational costs through accounting records, audited financial statements, and detailed expenditure documentation is required as a minimum. Saved expenses cannot be presumed, estimated, or established through tender bid documents that were not intended to reflect actual operational costs for damages purposes. An agreement on a tender price is not an agreement on saved expenses for calculating loss of profit. Where a plaintiff fails to produce evidence of saved expenses despite having exclusive knowledge of and access to such information, damages have not been proved on a balance of probabilities and the claim must fail. Furthermore, a tender appointment expressed as being "as and when required" with an express stipulation that the appointment letter is "not an official order" creates an order-based contract dependent on need, not an automatic contractual entitlement to perform all work contemplated in the tender.