#40 Hello I am having issues with this math question, may you show me the steps to solve this so I better understand?

David. the promoter c'fan outdoor concert, expects a net prot of $100,000, unless it rains, which would reduce the net prot to $20,000. The probability of rain is 0.40. For a premium $128,000 David can purchase insurance coverage that would pay him $100,000 in case of rain. Find the expected net prot when the insurance is not purchased. The expected net prot will be 33 when the insurance '6 not purchased