Diploma

"According to IAS11 Construction contracts, which TWO of the following could be valid reasons why the expected revenue from a fixed price construction contract has increased from the original contract value? 1. The costs in the contract have increased and the contract includes cost escalation clauses 2. The contractor has incurred additional costs due to errors made by its employees 3. The contractor has agreed variations to the contract with the client 4. The contractor would receive an incentive payment if work continues at the present rate for the next two years"