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:
American Idol (season 7)
Table title:
Regional auditions
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Episode Air Date </th><th colspan=1 rowspan=1 > Audition City </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > First Audition Venue </th><th colspan=1 rowspan=1 > Callback Date </th><th colspan=1 rowspan=1 > Callback Venue </th><th colspan=1 rowspan=1 > Golden Tickets </th></tr>
<tr> <td colspan=1 rowspan=1 > January 15, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > Philadelphia, Pennsylvania </td><td colspan=1 rowspan=1 > August 27, 2007 </td><td colspan=1 rowspan=1 > Wachovia Center </td><td colspan=1 rowspan=1 > September 1–2, 2007 </td><td colspan=1 rowspan=1 > Hyatt Regency </td><td colspan=1 rowspan=1 > 29 </td></tr>
<tr> <td colspan=1 rowspan=1 > January 16, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > Dallas, Texas </td><td colspan=1 rowspan=1 > August 6, 2007 </td><td colspan=1 rowspan=1 > Texas Stadium </td><td colspan=1 rowspan=1 > September 20–23, 2007 </td><td colspan=1 rowspan=1 > W Hotel Dallas Victory </td><td colspan=1 rowspan=1 > 24 </td></tr>
<tr> <td colspan=1 rowspan=1 > January 22, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > San Diego, California </td><td colspan=1 rowspan=1 > July 30, 2007 </td><td colspan=1 rowspan=1 > Qualcomm Stadium </td><td colspan=1 rowspan=1 > September 12–13, 2007 </td><td colspan=1 rowspan=1 > Rancho Bernardo Inn </td><td colspan=1 rowspan=1 > 31 </td></tr>
<tr> <td colspan=1 rowspan=1 > January 23, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > Charleston, South Carolina </td><td colspan=1 rowspan=1 > August 18, 2007 </td><td colspan=1 rowspan=1 > North Charleston Coliseum </td><td colspan=1 rowspan=1 > September 6–7, 2007 </td><td colspan=1 rowspan=1 > Charleston Area Convention Center </td><td colspan=1 rowspan=1 > 23 </td></tr>
<tr> <td colspan=1 rowspan=1 > January 29, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > Omaha, Nebraska </td><td colspan=1 rowspan=1 > August 10, 2007 </td><td colspan=1 rowspan=1 > Qwest Center Omaha </td><td colspan=1 rowspan=1 > October 5–6, 2007 </td><td colspan=1 rowspan=1 > Qwest Convention Center </td><td colspan=1 rowspan=1 > 19 </td></tr>
<tr> <td colspan=1 rowspan=1 > January 30, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > Miami, Florida </td><td colspan=1 rowspan=1 > August 22, 2007 </td><td colspan=1 rowspan=1 > American Airlines Arena </td><td colspan=1 rowspan=1 > September 29–30, 2007 </td><td colspan=1 rowspan=1 > JW Marriott Hotel </td><td colspan=1 rowspan=1 > 17 </td></tr>
<tr> <td colspan=1 rowspan=1 > February 5, 2008 </td><td class="highlighted"  colspan=1 rowspan=1 > Atlanta, Georgia </td><td colspan=1 rowspan=1 > August 14, 2007 </td><td colspan=1 rowspan=1 > Georgia Dome </td><td colspan=1 rowspan=1 > October 8–10, 2007 </td><td colspan=1 rowspan=1 > Georgia International Convention Center </td><td colspan=1 rowspan=1 > 21 </td></tr>
<tr> <th colspan=6 rowspan=1 > Total Tickets to Hollywood </th><th class="highlighted"  colspan=1 rowspan=1 > 164 </th></tr>
</table>
Question:
How many cities were auditioned and how many contestants were invited in total?
Answer:
A total of 164 contestants were invited from the seven auditioned Cities.