The default behavior of the MATCH function is to match the "next smallest" value in a list that's sorted in ascending order. Essentially, MATCH moves forward in the list until it encounters a value larger than the lookup value, then drops back to the previous value.
So, when lookup values are sorted in ascending order, both of these formulas return "next smallest":
=MATCH(value,array) // default =MATCH(value,array,1) // explicit
However, by setting match type to -1, and sorting lookup values in descending order, MATCH will return the next largest match. So, as seen in the example:
returns 4, since 400 is the next largest match after 364.
Find associated cost
The full INDEX/MATCH formula to retrieve the associated cost in cell F8 is: