A company has budgeted sales in units for the next five months as follows:

$\backslash$table$[[$June$,7,100$ units$],[$July$,5,400$ units$],[$August$,7,200$ units$],[$September$,6,900$ units$],[$October$,5,000$ units$]]$

The beginning inventory for September would be:

Multiple Choice

$690$ units

$710$ units

$720$ units

$500$ units