Please solve and explain step by step. Thank you...

An investor has taken 50 short positions on a futures contract with a starting time of 5.00$ per contract, a continuation period of 2.00$ for each contract and a current price of 30$. In addition, only 1 basis application is made for each contract. After 1 day, the contract price was 25$. How much funds need to be invested to cover the initial delivery