I am struggling to understand the math for this question:

Joe’s roof is destroyed by a hurricane. He and his family can’t live in the home until repairs are done. Joe also rents one bedroom to a local college student for $50 per month. It takes two months to repair the home. Joe pays $8,300 in additional expenses for hotel and meals away from home. Coverage D on Joe’s policy is $30,000. How much will Coverage D pay for the hurricane loss? $____

Answer: $8400

Can someone help break this down to better explain please?