Acontractor must pay a $40,000 penalty if construction of an expensive home requires

Acontractor must pay a $40,000 penalty if construction of an expensive home requires more than 16 weeks. he will receive a bonus of $10,000 if the home is completed within 8 weeks. based on experience with this type of project, the contractor feels there is a 0.2 chance the home will require more than 16 weeks for completion, and there is a 0.3 chance it will be finished within 8 weeks. if the price of the home is $550,000 before any penalty or bonus adjustment, how much can the buyer expect to pay for her new home when it is completed?