relevant costing:labour

kaplan rk -sec b-decision making techniques-qn 206
Q: 100 hours of skilled and 56 hours of unskilled labour will be required for the
upholstery and flooring work. Skilled labour is paid the market rate of $25/hour and
is currently fully employed on another job, where they earn a contribution of
$6/hour. Alternatively new skilled labour could be employed, but the new workers
will require training at a cost of $14/hour for the first 10 hours they are working.
Unskilled workers are currently paid $12/hour and each of the 5 workers is
guaranteed a minimum wage of $420 per week. Each unskilled employee has enough
work allocated to them for the next three weeks to earn $372 per week. The work to
be done by the unskilled labour on Bow must be completed within the first week of
the project starting and overtime is paid at time and half.
What cost should be included in the quote for the skilled and unskilled labour?
$_______ skilled labour $_______ unskilled labour
?????????sir,what does a time and half means?and if fully employed there may be 2 cases 1.can hire or 2.cannot hire here what does fully employed on another job mean?does it mean it takes workers from another project?and is project and contract the same?