Displaying two possible IF function outcomes in one cell

Hey guys!
I'm a personal trainer, and I'm working on a training spreadsheet for a few of my clients to serve as a template.
What I have right now is an IF statement that calculates the load to be used based on a cells defined name.
The problem I'm encountering is that I have two possible percentages of the 1RM (one rep max) in several cells, thus resulting in a #VALUE error.

Formula is as follows:

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It works if the percentage is fixed (70%,75%,80%,etc)
I want it two display two possible loads to be used if the percentage is, for example, 77.5-80%

Is this possible?

at first glance:
I8: 72.5%
I9: 77.5%-80%
J8:

Formula:

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result:
J8: 85
J9: 90-95


Edit: fixed

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