Harden, Incorporated, has budgeted sales in units for the next five months as follows:

$\backslash$table$[[$June$,8,400$ units$],[$July$,6,700$ units$],[$August$,8,500$ units$],[$September$,8,200$ units$],[$October$,6,300$ units$]]$

Past experience has shown that the ending inventory for each month should be equal to $20\%$ of the next month's sales in units. The inventory on May $31$ contained $1,680$ units. The company needs to prepare a production budget for the next five months.

The beginning inventory for September should be:

Multiple Choice

$1,640$ units