Here's the report I got on here - 'All Assets from the Asset Menu' which recreates that menu item... then I added where it's NOT a monitor - which gives you the count
Select Top 1000000 tblAssets.AssetID,
tblAssets.AssetName,
tsysAssetTypes.AssetTypename As AssetType,
tsysAssetTypes.AssetTypeIcon10 As icon,
tblAssets.Domain,
Coalesce(tsysOS.OSname, tblLinuxSystem.OSRelease, tblMacOSInfo.SystemVersion)
As OS,
tblAssetCustom.Model,
tblAssetCustom.Manufacturer,
tblAssets.IPAddress,
tsysIPLocations.IPLocation,
tblAssets.Mac As MACAddress,
tblADComputers.OU,
tblState.Statename As State,
tblAssets.Firstseen,
tblAssets.Lastseen,
tblAssets.Lasttried,
tblAssets.Description,
tblAssetCustom.PurchaseDate,
tblAssetCustom.Warrantydate,
tblAssets.FQDN,
tblAssetCustom.DNSName,
tblAssetCustom.LastPatched,
tblAssetCustom.LastFullbackup,
tblAssetCustom.LastFullimage,
tblAssetCustom.Location,
tblAssetCustom.Building,
tblAssetCustom.Department,
tblAssetCustom.Branchoffice,
tblAssetCustom.BarCode,
tblAssetCustom.Contact,
tblAssetCustom.Serialnumber,
tblAssetCustom.OrderNumber,
tblAssetCustom.Custom1,
tblAssetCustom.Custom2,
tblAssetCustom.Custom3,
tblAssetCustom.Custom4,
tblAssetCustom.Custom5,
tblAssetCustom.Custom6,
tblAssetCustom.Custom7,
tblAssetCustom.Custom8,
tblAssetCustom.Custom9,
tblAssetCustom.Custom10,
tblAssetCustom.Custom11,
tblAssetCustom.Custom12,
tblAssetCustom.Custom13,
tblAssetCustom.Custom14,
tblAssetCustom.Custom15,
tblAssetCustom.Custom16,
tblAssetCustom.Custom17,
tblAssetCustom.Custom18,
tblAssetCustom.Custom19,
tblAssetCustom.Custom20,
Case tblAssetCustom.PreventCleanup
When 0 Then 'No'
When 1 Then 'Yes'
End As PreventCleanup,
tblAssets.Scanserver
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
Inner Join tsysIPLocations On tsysIPLocations.LocationID =
tblAssets.LocationID
Left Join tblADComputers On tblAssets.AssetID = tblADComputers.AssetID
Inner Join tblState On tblState.State = tblAssetCustom.State
Left Join tblLinuxSystem On tblAssets.AssetID = tblLinuxSystem.AssetID
Left Join tsysOS On tblAssets.OScode = tsysOS.OScode
Left Join tblMacOSInfo On tblAssets.AssetID = tblMacOSInfo.AssetID
Where tsysAssetTypes.AssetTypename <> 'Monitor'
Order By tblAssets.AssetName