You left out the number of shrubs.
It should be right after "... $17.50 and ___".
I'll just have to call it ' S ' .
-- The total bill was $71 .
The potting soil cost $17.50 .
So the shrubs cost ($71 - $17.50) = $53.50 .
-- If each shrub cost the same amount,
and he bought 'S' shrubs,
then the price of each shrub was
$53.50 / S .
If I knew what ' S ' was, I could solve this equation.
