ช่วยดูโค๊ดหาราคาทุนรวมให้หน่อยค่ะ คำนวณถูกแต่ลงดาต้าเบสผิด

<table width="879" border="1" align="center" cellpadding="2" cellspacing="0" bordercolor="#666666">
                          <tr>
                            <td width="47" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">ลำดับ</span></td>
                            <td width="83" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">รหัสวัตถุดิบ</span></td>
                            <td width="226" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">ชื่อวัตถุดิบ</span></td>
                          
                            <td width="97" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">ประเภทวัตถุดิบ</span></td>
                            <td width="89" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">จำนวนสั่งซื้อ</span></td>
                            <td width="101" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">จำนวนที่รับ</span></td>
                            <td width="107" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">ราคาทุนรวม</span></td>
                      
                       
                           
                            <td width="30" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">หน่วย</span></td>
                            <td width="30" align="center" bordercolor="#999999" bgcolor="#CCE6F2"><span class="style16">ราคารวม</span></td>
                          </tr>
                          
                     
                             <?
                        	$sql1 = "SELECT distinct material.m_id,ordermat.ormat_id,material.m_name,ordermat_detail.ormat_qty,material.m_cost,ordermat_detail.ormatdetail_id,material.m_unitsale,material_type.mt_name
					                FROM ordermat_detail, ordermat , material , material_type
	                                WHERE ordermat_detail.ormat_id = ordermat.ormat_id
                                    AND ordermat_detail.m_id = material.m_id   
									AND material.mt_id = material_type.mt_id                            
                                    AND ordermat.ormat_id ='$id'
									ORDER BY ordermat_detail.ormatdetail_id";
							$result1 = mysql_query($sql1);
							$n=0;
							while($read1 = mysql_fetch_array($result1)){
							$n++;
							?>
                
                                               
                          <tr>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16"><?=$n;?></span></td>             
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16"><?=$read1['m_id'];?></span></td>
                            <input type="hidden" name="mat[]" value="<?=$read1['m_id'];?>"/>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16"><?=$read1['m_name'];?></span></td>
                        
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16"><?=$read1['mt_name'];?></span></td>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16"><?=$read1['ormat_qty'];?></span></td>
                            
                            <input type="hidden" name="amountt[]" id="amountt<?=$n?>" value="<?=$read['ormat_qty'];?>" />
                            
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16">
                              <input size="7" type="text" name="receive_amt[]" id="amt<?=$n?>" value="<?=$read1['ormat_qty'];?>"/>
                            </span></td>
                                               
                                                            
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF">
							
                            <input name="price[]" type="text" value="<?=$read1['m_cost']?>" size="15"/></td>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16">
                            <?=$read1['m_unitsale'];?>
                            </span></td>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><? echo number_format($read1['ormat_qty']*$read1['m_cost'],2)?></td>
                          </tr>
                   <? $total = ($read1['ormat_qty']*$read1['m_cost'])+$total; ?>
                           <? } ?>
                          <tr>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF">&nbsp;</td>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF">&nbsp;</td>
                            <td colspan="6" align="right" bordercolor="#999999" bgcolor="#FFFFFF"><span class="style16">รวมราคาทั้งสิ้น</span></td>
                            <td align="center" bordercolor="#999999" bgcolor="#FFFFFF"><?=number_format($total,2);?></td>
                          </tr>
                    </table>