```ruby
xml.instruct! :xml, :version=>"1.0", :encoding=>"UTF-8"

xml.rss "version" => "2.0", "xmlns:g" => "http://base.google.com/ns/1.0" do
  xml.channel do
    xml.title Spree::GoogleMerchant::Config[:google_merchant_title]
    xml.description Spree::GoogleMerchant::Config[:google_merchant_description]
    
    production_domain = Spree::GoogleMerchant::Config[:production_domain]
    xml.link production_domain
    
    @products.each do |product|
      xml.item do
        xml.id product.id.to_s
        xml.title product.name
        xml.description CGI.escapeHTML(product.description.to_s)
        xml.link production_domain + 'products/' + product.slug
        xml.tag! "g:mpn", product.sku.to_s
        xml.tag! "g:id", product.id.to_s
        xml.tag! "g:price", product.prices.first.money,to_s #product_price(product, {:format_as_currency => false})
        xml.tag! "g:condition", "new"
        xml.tag! "g:image_link", production_domain.sub(/\/$/, '') + product.variant_images.first.attachment.url(:product) unless product.variant_images.empty?
      end
    end
  end
end```

Fix product price nil error
user
```ruby
xml.instruct! :xml, :version=>"1.0", :encoding=>"UTF-8"

xml.rss "version" => "2.0", "xmlns:g" => "http://base.google.com/ns/1.0" do
  xml.channel do
    xml.title Spree::GoogleMerchant::Config[:google_merchant_title]
    xml.description Spree::GoogleMerchant::Config[:google_merchant_description]
    
    production_domain = Spree::GoogleMerchant::Config[:production_domain]
    xml.link production_domain
    
    @products.each do |product|
      xml.item do
        xml.id product.id.to_s
        xml.title product.name
        xml.description CGI.escapeHTML(product.description.to_s)
        xml.link production_domain + 'products/' + product.slug
        xml.tag! "g:mpn", product.sku.to_s
        xml.tag! "g:id", product.id.to_s
        xml.tag! "g:price", product.prices.first.try(:money).to_s #product_price(product, {:format_as_currency => false})
        xml.tag! "g:condition", "new"
        xml.tag! "g:image_link", production_domain.sub(/\/$/, '') + product.variant_images.first.attachment.url(:product) unless product.variant_images.empty?
      end
    end
  end
end```
assistant