Using Taylors Differential Piece Rate System, calculate the earnings of workers from the following information:

Normal rate per hour = 12 OMR

Standard time per piece = 20 minutes

Differentials to be applied.

1. 83% of Piece rate below standard.
2. 120% of Piece rate at or above standard.

In a 9-hour day, Labor A produces 26 units and Labor B produces 30 units.