Question 910165
Let {{{ s }}} = the monthly sales
Let {{{ I }}} = the monthly income
{{{ I = .05s + 500 }}}
{{{ 1200 = .05s + 500 }}}
{{{ .05s = 700 }}}
{{{ s = 700/.05 }}}
{{{ s = 14000 }}}
The monthly sales is $14,000