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:
Vogue (Madonna song)
Table title:
Certifications
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 > Australia (ARIA) </th><td colspan=1 rowspan=1 > 2× Platinum </td><td colspan=1 rowspan=1 > 140,000^ </td></tr>
<tr> <th colspan=1 rowspan=1 > Canada (Music Canada) </th><td colspan=1 rowspan=1 > Platinum </td><td colspan=1 rowspan=1 > 10,000^ </td></tr>
<tr> <th colspan=1 rowspan=1 > France (SNEP) </th><td colspan=1 rowspan=1 > Silver </td><td colspan=1 rowspan=1 > 220,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > Japan (Oricon Charts) </th><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 52,370 </td></tr>
<tr> <th colspan=1 rowspan=1 > New Zealand (RMNZ) </th><td colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 5,000* </td></tr>
<tr> <th colspan=1 rowspan=1 > United Kingdom (BPI) </th><td colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 663,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > United States (RIAA) </th><td colspan=1 rowspan=1 > 2× Platinum </td><td colspan=1 rowspan=1 > 2,000,000^ </td></tr>
<tr> <th class="highlighted"  colspan=3 rowspan=1 > Digital </th></tr>
<tr> <th colspan=1 rowspan=1 > Brazil (Pro-Música Brasil) </th><td colspan=1 rowspan=1 > Gold </td><td colspan=1 rowspan=1 > 100,000* </td></tr>
<tr> <th colspan=1 rowspan=1 > United States </th><td colspan=1 rowspan=1 > — </td><td class="highlighted"  colspan=1 rowspan=1 > 311,000 </td></tr>
<tr> <td colspan=3 rowspan=1 > *sales figures based on certification alone ^shipments figures based on certification alone </td></tr>
</table>
Question:
Where has "Vogue" sold the most digital units, and how many has it sold there?
Answer:
"Vogue" has sold 311,000 digital certified units in the United States.