<h3 align='left'>Stockbook</h3>
<center>
<table border='1' width='98%'>
<tr><th>Sr</th><th>Dated</th><th>Medicine Name</th><th>Opening Stock</th><th>Received Qty</th><th>Total Qty</th><th>Used Qty</th><th>Balance Qty</th></tr>

<?php

$tbl = 'medicines';

$rs = mysql_query("select *,date(date_creation) as dated from $tbl order by med_name");
while ($o = mysql_fetch_object($rs)) {
	$i++;
	$dated = $o->dated;
	$opening_stock = $o->qty_receipt;
	$qty_total = $opening_stock;
	$qty_balance = $opening_stock;
        
	echo "<tr>
	<td><a name='$i'></a>$i</td>
	<td>$dated</td>
 	<td><a href='doctor/?pg=$pg&medid=$o->med_id#$i'>$o->med_name</a></td>
	<td align='right'>$opening_stock</td>";

	//receipt summary
	$sr = mysql_query("select sum(qty_receipt) as qty_received from receipts 
        where med_id=$o->med_id group by med_id");
       	if (mysql_num_rows($sr)) {
                $q = mysql_fetch_object($sr);
		$qty_total = $qty_total + $q->qty_received;

		echo "<td align='right'>$q->qty_received</td>
		<td align='right'>$qty_total</td>";
        } else {
		echo "<td></td>
		<td align='right'>$qty_total</td>";
	} 
        
	//consumption summary
        $rr = mysql_query("select sum(qty) as qty_used from medications
        where med_id=$o->med_id group by med_id");
        if (mysql_num_rows($rr)) {
        	$r = mysql_fetch_object($rr);
                $qty_balance = $qty_total - $qty_used;

		echo "<td align='right'>$r->qty_used</td>
		<td align='right'>$r->qty_balance</td>";
	} else {
		echo "<td></td>
		<td align='right'>$qty_balance</td>";
	}
	echo "</tr>"; 
}
?>

</table>
</center>