Cómo emitir una columna calculada con el resultado decimal/$ correcto

BOL dice:

Por lo tanto, debe convertir [val1], 1000 y [val2] en tipos flotantes:

[Total] AS CAST ( ((CAST ([val1] as float)/CAST (1000 as float)) * CAST ([val2] as float)) AS DECIMAL(18,2)) PERSISTED