If A-7 has a total dollar amount of $77400 of labor costs or $ 7.74 per unit hour of labor costs ( i think i calculated that correctly, not 100% sure ) to get the taxes would i then then multiple $77,400 by 8.5%, then 5.5% and 2% to get the tax rates?

so would i get $6,579, $4,257, and 1,548