1) 1 story :
 <select name="drawing_setting_standard_height" id="drawing_setting_standard_height" class="form-control cusht" onchange="loadCustomWallHeight(this.value)">           
                     
    <option value="243.84">8'-0"</option>
    <option value="259.08">8'-6"</option>
    <option value="274.32">9'-0"</option>
    <option value="289.56">9'-6"</option>
    <option value="304.8">10'-0"</option>
    <option value="custom" >Custom Height</option>
    </select>

2)2 story:
1st story:
<option value="243.84">8-0"</option>
<option value="259.08">8-6"</option>
<option value="274.32">9-0"</option>
<option value="289.56">9-6"</option>
<option value="304.8">10-0"</option>
<option value="custom">Custom Height</option>

2nd story
 <select name="drawing_setting_standard_height" id="drawing_setting_standard_height" class="form-control cusht" onchange="loadCustomWallHeight(this.value)">           
                     
<option value="243.84">8'-0"</option>
<option value="259.08">8'-6"</option>
<option value="274.32">9'-0"</option>
<option value="289.56">9'-6"</option>
<option value="304.8">10'-0"</option>
<option value="custom" >Custom Height</option>
</select>