$9\mathrm{.}6$ A crawler hoe having a $3\frac{1}{2}-$cy bucket and whose cost per hour, including the wages to an operator, is $$130$ will excavate and $l_{\text{O}\text{a}\text{d}}$ trucks under each of the stated conditions. The maximum digging height of the machine is $26ft.$ Determine the cost per cubic yard $fo{r}_{0r}$ each condition.

$\backslash$table$[[$Condition$,(1),(2),(3),(4)],[$Material$,$Sandy,Hard,Rock,,Sand and$],[,$clay,clay,well blasted,gravel$],[$Depth of excavation $($ft$),12,17,14,15],[$Angle of swing $($degrees$),50,60,90,120],[$Percent swell,$22,,,15],[$Efficiency factor $($min per hr$),50,45,40,45]]$