Farmstar Ltd is a trader in wheat, which started operations in 2021. At the start of the year, they purchased 10,000 bags of wheat at a price of 2 per bag. Given a successful first half-year of activity, they purchased additional 15,000 bags at a price of 3 per bag. At the end of their first trading year in 2021, they had sold 22,000 bags of wheat at a price of 6 per bag. Under the FIFO method of inventory valuation, what is Farmstar's Gross profit margin and inventory days in 2021