The monthly revenue achieved by selling x boxes of candy is figured to be

x(5 - 0.05x) dollars. The wholesale cost of each box of candy is $1.50. How many boxes must be sold each month to achieve a profit of at least $60?

What about if the question asked:

How many boxes must be sold each month to achieve a profit of at most $60?

In terms of inequality word problems, what is the difference between at least and at most questions?

Thanks