<div>
<style>
/* Start counter from 0 inside tbody */
tbody#lineitem {
counter-reset: rowNumber;
}
/* Increment counter for each row */
tbody#lineitem tr {
counter-increment: rowNumber;
}
/* Show counter value in first column */
tbody#lineitem tr td:first-child::before {
content: counter(rowNumber);
font-size: 10px;
font-family: Calibri;
}
</style>
<table style="width: 100%; border-collapse: collapse; text-align: center; max-width: 100%;" cellpadding="5" cellspacing="0" border="1">
<thead style="background:#f2f2f2; font-weight:bold;">
<tr>
<th style="width:5%;">S.No</th>
<th style="width:45%;">Item Name</th>
<th style="width:20%;">HSN</th>
<th style="width:15%;">Quantity</th>
<th style="width:15%;">Amount</th>
</tr>
</thead>
<tbody id="lineitem">
<tr>
<td></td>
<td style="text-align:left;">Item 1</td>
<td>7208</td>
<td>10</td>
<td>5000<br></td>
</tr>
</tbody>
</table>
<div><br></div>
</div>