I know.. it's very expensive, that's why I suggested that you try reaching out to you officer to see if he would accept as is, after all it's just numbers right?
If it's any consolation I've spent more than $1500 CAD just in translations up to this point and I'm expecting that to go up with the ITA (more docs to translate ???)
As a last resort, but I wouldn't recommend this, you could just send as is and a LoE explaining what lines pertain to your salary and saying that you couldn't find a suitable translator in te allotted time, but if they really require a translated version to send you another ADR and you'll do your best to comply. Again, I think this is risky as you officer may just ignore your submitted docs and you could get a PFL for failing to provide the requested docs as per OINP guidelines (which state they must be translated by a certified translator)... Up to you!