X AND Y PRODUCES WIDGET
EACH SHOULD TAKE 0.5 HOURS TO MAKE. STANDARD RATE OF PAY IS $ 10
IDLE TIME TO BE 5% OF HOURS PAID
THEY ACTUALLY PRODUCES 10800 WIDGET THEY PAY 6000 HOURS FOR $ 50000 OF WHICH 330 ARE IDLE TIME
WHAT IS LABOUR EFFICIENCY AND LABOUR IDLE TIME VARIANCE