<h3 align='left'>Medicine requirement prediction based on last year consumption</h3>
<center>
<?php

$tbl = 'medicines';
$fyear = date("Y") - 1;

echo "<table border='1' width='90%'>
<tr><th rowspan='2'>Sr</th><th rowspan='2'>Months =><br>Medicines v</th>
<th rowspan='2'>Open<br>Qty</th><th colspan='12'>Monthly Quantity Used</th>
<th rowspan='2'>Used<br>Qty</th><th rowspan='2'>Average<br>/Month</th>
<th rowspan='2'>Predicted<br>Qty</th><th rowspan='2'>Indent<br>Qty</th></tr>
<tr>";

foreach ($months as $mnth) {
	echo "<th>$mnth</th>";
}

echo "</tr>";

$sl = 0;
$rs = mysql_query("select med_id,med_name from $tbl order by med_name");
while ($o = mysql_fetch_object($rs)) {
	$sl++;
	$mid = $o->med_id;
	echo "<tr><td>$sl</td><td>$o->med_name</td>";

        $sr = mysql_query("select sum(qty_receipt) as rq from receipts where med_id=$mid and year(rec_date)<$fyear group by med_id");
        if (mysql_num_rows($sr)) {
              $q = mysql_fetch_object($sr);
              $rqty = $q->rq;
	} else $rqty = 0;

        $sr = mysql_query("select sum(qty) as uq from medications where med_id=$mid and year(dis_datetime)<$fyear group by med_id");
        if (mysql_num_rows($sr)) {
              $q = mysql_fetch_object($sr);
              $uqty = $q->uq;
        } else $uqty = 0;

	$oqty = $rqty - $uqty;
        echo "<td>$oqty</td>";

	$tot = 0; $j = 0; $avg = 0;
	for ($i=1; $i <= $no; $i++) {
		$sr = mysql_query("select sum(qty) as iq from medications where med_id=$mid and concat(year(dis_datetime),'-',month(dis_datetime))='$fyear-$i' group by med_id");
		echo '<td>';
		if (mysql_num_rows($sr)) {
			$j++;
			$q = mysql_fetch_object($sr);
			$iqty = $q->iq;
			$tot += $iqty;
			$avg = ceil($tot/$j);
			echo $iqty;
		} else {
			echo '';
		}
		echo '</td>';
	}
	echo "<td>$tot</td>";

        $sr = mysql_query("select sum(qty_receipt) as rq from receipts where med_id=$mid and year(rec_date)=$fyear group by med_id");
        if (mysql_num_rows($sr)) {
              $q = mysql_fetch_object($sr);
              $rqty = $q->rq;
        } else $rqty = 0;

	$cqty = ($oqty + $rqty) - $tot;
	$pqty = $avg * 6;
	echo "<td>$avg</td><td>$pqty</td><td>&nbsp;</td></tr>";
}
	
?>
</table>
</center>