Simple problem:
Find number of LH by diving the surface area by the crew productivity
5000ft^2/200ft^2/LH=25LH
Find total labor cost per hour:
1x$29/hr +3x$21/hr +1x$16/hr = $108/hr
Total cost for the painting:
$108/hr x 25 hr= $2,700.00
You guys get it already