Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
The Collector's Series, Volume One
Table title:
Certifications and sales
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Region </th><th colspan=1 rowspan=1 > Certification </th><th colspan=1 rowspan=1 > Certified units/Sales </th></tr>
<tr> <th colspan=1 rowspan=1 > Finland </th><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 10,238 </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > France (SNEP) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 155,300 </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Germany (BVMI) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 150,000^ </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Hungary (MAHASZ) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 25,000 </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Japan (RIAJ) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 100,000^ </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Netherlands (NVPI) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 40,000^ </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > New Zealand (RMNZ) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 7,500^ </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Switzerland (IFPI Switzerland) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 25,000^ </td></tr>
<tr> <th colspan=1 rowspan=1 > United Kingdom (BPI) </th><td colspan=1 rowspan=1 > Silver </td><td colspan=1 rowspan=1 > 60,000^ </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > United States (RIAA) </th><td class="highlighted"  colspan=1 rowspan=1 > Gold </td><td class="highlighted"  colspan=1 rowspan=1 > 914,000 </td></tr>
<tr> <th colspan=3 rowspan=1 > Summaries </th></tr>
<tr> <th colspan=1 rowspan=1 > Worldwide </th><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 3,000,000 </td></tr>
<tr> <td colspan=3 rowspan=1 > ^shipments figures based on certification alone </td></tr>
</table>
Question:
How were the sales of the Collector's Series?
Answer:
The Collector's Series was certified gold in many countries, including the United States, where it has sold 914,000 copies.