An operator, engaged in machining certain components, receives an ordinary day rate of 1.60 per day of 8 hours. The standard output for machining the components has been fixed at 80 pieces per hour (time as fixed for premium bonus). On a certain day, the output of the worker on this machine is 800 pieces. Find the labour cost per 100 pieces and the wages that should have been actually earned by the workman under the following: (i) If a bonus of 0.23 is paid per 100 of the extra output; (ii) If wages is paid on a straight piece work basis at the standard rate; (iii) If Halsey premium system is being adopted