SELECT * ,
SUM( `Janunits` + `Febunits` + `Marunits` + `Aprunits` + `Mayunits` + `Jununits` + `Julunits` + `Augunits` + `Sepunits` + `Octunits` + `Novunits` + `Decunits` ) AS TotalUnits,
IF( SUM( `Janunits` + `Febunits` + `Marunits` + `Aprunits` + `Mayunits` + `Jununits` + `Julunits` + `Augunits` + `Sepunits` + `Octunits` + `Novunits` + `Decunits` ) =0, 0, SUM( SUM( `Janunits` + `Febunits` + `Marunits` + `Aprunits` + `Mayunits` + `Jununits` + `Julunits` + `Augunits` + `Sepunits` + `Octunits` + `Novunits` + `Decunits` ) - `inventory.Year1qty` ) / SUM( `Janunits` + `Febunits` + `Marunits` + `Aprunits` + `Mayunits` + `Jununits` + `Julunits` + `Augunits` + `Sepunits` + `Octunits` + `Novunits` + `Decunits` ) ) AS Percent
FROM `inventory`
WHERE `Dept` = 'WIDGET'
GROUP BY Item
ORDER BY Brand ASC