Roberts Enterprises has budgeted sales in units for the next five months as follows:

$\backslash$table$[[$June$,4,500$ units$],[$July$,7,100$ units$],[$August$,5,300$ units$],[$September$,6,700$ units$],[$October$,3,700$ units$]]$

Past experience has shown that the ending inventory for each month must be equal to $10\%$ of the next month's sales in units. The inventory on May $31$ contained $450$ units. The company needs to prepare a production budget for the second quarter of the year.

The beginning inventory in units for September is:

Multiple Choice

$370$ units

$6,700$ units