Understanding crystal suppression

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CrystalReports

I am new to Crystal and am trying to understand the following Details Row Suppression. I understand the first line and the 3rd line but the second line starting with the if(FLAG_TRACK_BIN)=1 is throwing me for a loop. Here is the entire suppression clause. Is it possible to write this in the sql?

((loc_qty_onhd - loc_qty_alloc ) >=0 and (loc_qty_onhd)>(LEVEL_ROP) and if(FLAG_TRACK_BIN)=1 then (Bin_QTY_ONHD)>(LEVEL_ROP) else (FLAG_TRACK_BIN)=0 ) OR (Bin_KEY_BIN_1)="SHOP" or ((loc_qty_onhd - loc_qty_alloc )>=0 and (LEVEL_ROP)=0) or (FLAG_VND_PRIM)="S"

Can anyone explain to me what the second line is doing ? The "Then" is throwing me off

What I have tried:

the "Then" in this line has me confused.

if(FLAG_TRACK_BIN)=1 then (Bin_QTY_ONHD)>(LEVEL_ROP) else (FLAG_TRACK_BIN)=0 ) OR