Bioclean Co., a merchandiser, sells a biodegradable cleaning product and has predicted the following sales for the first four months of the current year:

Jan.Feb.MarchAprilSales in Units 1,7001,9002,1001,600

Ending inventory for each month should be 20% of the next month's sales, and the December 31 inventory is consistent with that policy. How many units should be purchased in February?

• 1,860.
• 2,320.
• 1,900.
• 1,980.
• 1,940.