## ProductBulkRate

The `product_bulk_rate` object describes a bulk discount for a product based on quantity.
```liquid
{%- comment -%} List bulk rates for a product {%- endcomment -%}
{% for rate in product.bulk_rates %}
  <rate qty="{{ rate.quantity }}" amount="{{ rate.amount }}" percentage="{{ rate.is_percentage }}"/>
{% endfor %}
```

## is_percentage

Returns true if discount is a percentage.

## amount

Returns the discount amount.

## quantity

Returns the quantity to purchase to get this discount.