Answer:
Yes, Hazel needs to pay extra $700
Step-by-step explanation:
As per pre-existing duty rule, a person is obligated to perform his duty at the consideration agreed upon initially. Any modification to the contract is void.
Exceptions to this rule:
- As per new contract, if the person undertaking his duty hires another person to perform the work so as to complete it in time, then modifications are valid and enforceable.
- Modifications are valid in case of unforeseen contingencies like war, recession, change in economic conditions and strikes.
In this case, Hazel agreed to pay $700 extra. Under pre-existing duty rule, she is not required to pay Eugene extra $700 but since Eugene took additional help exception to the rule applies and Hazel is obligated to pay $700 extra.