Ivanhoe Construction enters into a contract with a customer to build a warehouse for $$850000$ on March $30,2024$ with a performance bonus of $$40000$ if the building is completed by July $31,2024.$ The bonus is reduced by $$8000$ each week that completion is delayed. Ivanhoe commonly includes these completion bonuses in its contracts and, based on prior experience, estimates the following completion outcomes:

$\backslash$table$[[$Completed by$,$Probability$],[$July $31,2024,70\%$