Add ‘How to pay’ page

Content from https://docs.google.com/document/d/1uIFW8c7Vk0-FQ-d8H1FmNZLHKn_tOXWg5oUL8bbcZzw/edit?ts=5ced1ae4#

app/templates/views/pricing/how-to-pay.html

@@ -0,0 +1,60 @@
+{% from "components/page-header.html" import page_header %}
+
+{% extends "withoutnav_template.html" %}
+
+{% block per_page_title %}
+  How to pay
+{% endblock %}
+
+{% block maincolumn_content %}
+
+  <div class="grid-row">
+    <div class="column-two-thirds">
+
+      {{ page_header('How to pay') }}
+
+      <h2 class="heading-medium" id="invoices">
+        Invoices
+      </h2>
+
+      <p>
+        We’ll send your organisation an invoice each quarter if:
+      </p>
+
+      <ul class="list list-bullet">
+        <li>you exceed the free text message allowance</li>
+        <li>you send letters</li>
+      </ul>
+
+      <p>
+        If your organisation has more than one service that owes money the invoice will be broken down by service.
+      </p>
+
+      <p>
+        If the invoice is less than £250 +VAT, we’ll roll it into the next quarter’s invoice to save time and effort.
+      </p>
+
+      <p>
+        You can pay by BACS, debit card, or credit card.
+      </p>
+
+      <h2 class="heading-medium" id="purchase-orders">
+        Purchase orders
+      </h2>
+
+      <p>
+        If your organisation’s annual usage will cost over £500 +VAT you need to provide us with a purchase order so we can invoice you.
+      </p>
+
+      <p>
+        Your organisation should raise a single purchase order to cover the estimated annual usage costs for all your Notify services. This purchase order should be updated if the estimated annual usage costs increase.
+      </p>
+
+      <p>
+        You may need to set up Cabinet Office as a supplier before you can raise a purchase order. If you need any details to do that, please <a href="{{ support_link }}">get in touch with us</a>.
+      </p>
+
+    </div>
+  </div>
+
+{% endblock %}