Consider a 6-months futures contract on silver. Assume no income and that it costs $X per ounce per year to store silver, with payment being made at the end of the year. The spot price is $26 per ounce and the risk free rate is 4% per annum for all maturities, based on continuous compounding. The futures price of the 6-month futures contract on silver is $29 per ounce. Assume that no arbitrage Futures-Spot parity with storage costs holds. The storage cost per ounce per year ($X) is