A rectangular storage container with an open top is to have a volume
of 30 cubic meters. The length of its base is twice the width.
Material for the base costs 15 dollars per square meter.
Material for the sides costs 9 dollars per square meter. Find
the cost of materials for the cheapest such container.
Total cost =
(Round to the nearest penny and include monetary units.
For example, if your answer is 1.095, enter $1.10
including the dollar sign and second decimal place.)