For that money, you must have replaced the heat exchanger with hoses - lists for $146, about $105 from on-line discount dealers, so, yeah, I can see how you got to $175. I had forgotten about the heat exchanger.
For future reference, you can replace just the hoses (and re-use the heat exchanger because they don't need to be replaced), but you have to be clever about it by ordering the hose for the pre-heat exchanger design and cutting the hose in 3 pieces and discarding the center section. Cost of the hose that way is under $15.
There's a second hose - the crankcase breather hose, which also is under $15. Did you replace that, because they get real bad too? It is part of the PCV system, and is just as important as the PCV hose. It connects between the passenger side valve cover and the intake tube (less than a foot long with a 90 degree bend). You might want to also replace the elbow that it plugs into in the valve cover because they get brittle and often break when you remove the old hose - shouldn't be more than $2 or $3...
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EDIT: P/N for the PCV hose to cut and use with the heat exchanger is 4663961 (post no. 5:
PCV questions - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat). It is actually the part for the 3.2/3.5 engine (before the heat exchanger was added), but it works great for 2.7 as well for cutting and using with the heat exchanger.