Sassy Corp. uses a calendar-year accounting period but prepares monthly adjustments. Sassy has recorded all adjusting entries as of January 31, 2021. The firm has a balance of 118,800 in the Truck account and a 24,750 balance in the accumulated depreciation account at January 31, 2021. The truck has been estimated to have a useful life of six years with no salvage value. How many months has Sassy Corp. owned the truck?