Truliant Co$.$ sells a product called Withitall and has predicted the following sales for the first four months of the current year:

$\backslash$table$[[,$January,February,March,April$],[$Sales in units,$17,000,1,900,2,100,1,600]]$

Ending inventory for each month should be $20\%$ of next month's sales. The number of units produced in February should be

a$.1,940$ units

b$.1,900$ units

c$.1,800$ units

d$.1,850$ units