What is the rate Boxes 0 1 2 3 Pounds30 60 90?

The rates for the boxes based on the given weights are as follows: Box 0 is $30, Box 1 is $60, Box 2 is $90, and Box 3 is not specified in the provided information. It appears that the cost increases by $30 for each additional box. Therefore, if Box 3 follows the same pattern, it would likely cost $120.