Could you please make it in excel and show me the formula so that I can really understand the way clearly. Thanks

Question 1 Suppose that: The spot price of gold is US$1,700 per ounce The quoted 1-year futures price of gold is US$1,800 per ounce The 1-year US$ interest rate is 5% per annum No income or storage costs for gold What is the Arbitrage Opportunity for this case? How much? Explain the way complete and clearly. Thanks