Multi variant add to cart form

gistfile1.txt

<div id="inventory">
  <h3>Inventory Available</h3>
	{% assign options1 = product.variants | map: "option1" %}
  	 <table>          
		<tr>
			{% if product.options.size > 1 %}<th>&nbsp;</th>{% endif %}
			{% assign options1Filtered = '' %}
			{% for option1 in options1 %}
			{% assign option1Space = option1 | prepend: ', ' %}
			{% unless options1Filtered  contains option1Space %}
			<th><strong>{{ option1 }}</strong></th>	
			{% assign options1Filtered = options1Filtered | append: ', ' | append: option1 %}            
			{% endunless %}             
			{% endfor %}         
		</tr>

		{% if product.options.size > 1 %} 
		{% assign options2 = product.variants | map: "option2" %}

		{% assign options2Filtered = '' %}
		{% assign options1Split = options1Filtered | remove_first: ', '  | split: ', ' %}

		{% assign index = 1 %}
		{% for option2 in options2 %}
		<tr>
			{% assign optionSpace = option2 | prepend: ', ' %}

			{% unless options2Filtered contains optionSpace %}                         
			<td><strong>{{ option2 }}</strong></td>	             
			{% for option1 in options1Split %}
			{% assign variantFound = false %}
			<td>
				{% for variant in product.variants %}          	
				{% if variant.option1 == option1 and variant.option2 == option2 %}                
              {% if variant.available %}<input type="text" class="quantity-add" name="quantity-{{ forloop.index }}" id="{{ variant.id }}" value="0" size="2">{% else %}N/A{% endif %}        	
              			{% assign variantFound = true %}
                		{% endif %}      
              			{% if forloop.last and variantFound == false %}N/A{% endif %} 
				{% endfor %}
			</td>          
			{% endfor %}           
			{% assign options2Filtered = options2Filtered | append: ', ' | append: option2 %} 
			{% endunless %} 
		</tr>
		{% endfor %}        
		{% else %}
		<tr>
			{% for variant in product.variants %}
			<td><small>{{ variant.inventory_quantity }} Available</small><br><input type="text" class="quantity-add" name="quantity-{{ forloop.index }}" id="{{ variant.id }}" value="0" size="2">         	
			</td>
			{% endfor %}	
		</tr>
		{% endif %}
	</table>      
</div>