In October 2018, an investor entered a short position in forward on crude oil for delivery in October 2021. At that time, the spot price of crude oil was $70 per barrel and the risk-free rate of interest was 2% per annum. Currently, in October 2020, the spot price of crude oil is $40 per barrel and the risk-free rate of interest is 1% per annum. What is the value of the short position in the forward?