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:

=IF(D9="SQUAT",MROUND(SQMAX*I9,5),IF(D9="BENCH",MROUND(BNMAX*I9,5),IF(D9="DEADLIFT",MROUND(DLMAX*I9,5),)))

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:

=IFERROR(IF(C8="SQUAT",MROUND(SQMAX*MID(I8,1,SEARCH("-",I8)-1),5),IF(C8="BENCH",MROUND(BNMAX*MID(I8,1,SEARCH("-",I8)-1),5),IF(C8="DEADLIFT",MROUND(DLMAX*MID(I8,1,SEARCH("-",I8)-1),5),)))&"-"&IF(C8="SQUAT",MROUND(SQMAX*MID(I8,SEARCH("-",I8)+1,999),5),IF(C8="BENCH",MROUND(BNMAX*MID(I8,SEARCH("-",I8)+1,999),5),IF(C8="DEADLIFT",MROUND(DLMAX*MID(I8,SEARCH("-",I8)+1,999),5),))),IF(C8="SQUAT",MROUND(SQMAX*I8,5),IF(C8="BENCH",MROUND(BNMAX*I8,5),IF(C8="DEADLIFT",MROUND(DLMAX*I8,5),))))

result:
J8: 85
J9: 90-95


Edit: fixed

=IF(LEN(I8)-LEN(SUBSTITUTE(I8,"-",""))=0,MROUND(CHOOSE(MATCH(C8,{"Squat","Bench","Deadlift"},0),SQMAX,BNMAX,DLMAX)*I8,5),MROUND(CHOOSE(MATCH(C8,{"Squat","Bench","Deadlift"},0),SQMAX,BNMAX,DLMAX)*LEFT(I8,FIND("-",I8)-1)/100,5)&" - "&MROUND(CHOOSE(MATCH(C8,{"Squat","Bench","Deadlift"},0),SQMAX,BNMAX,DLMAX)*MID(I8,FIND("-",I8)+1,LEN(I8)),5))