Nested IF (index and match)

I'm trying to hone a quoting tool to generate an amount based on a given range and minimum charges for specified subsects of the range. If you reference the attachment I'm trying to calculate a charge in cell K15 based on values in B9 and C10 referencing the table I8:R9. What I cant figure out is how to create a minimum charge of 50 for J8:P9 (points A-G) and a charge of 95 for Q8:R9 (points H-I).

Let me know if you have any questions, and thanks in advance.