Question 1080273
<pre>
                    WORKRATE           TIME         SLAB

MARCUS              {{{1/9}}}                    9            1

TONY               {{{1/6}}}                     6            1

Combined          {{{1/9+1/6}}}
</pre>
(NOTE: The "cost of labor is $ 49.00 per hour.")


Their work rate when both together 
{{{1/9+1/6}}}

{{{2/18+3/18}}}

{{{5/18}}} {{{slab_per_hour}}}


Time, for doing just 1 slab
{{{18/5}}};

Estimating labor cost at $49 per hour,  {{{(18/5)(hour/slab)(49)(dollars/hour)}}};
.
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