2004 Dodge Caravan oil leak

I went out to my van this morning and noticed a puddle under the vehicle. Upon closer inspection I determined it was a clear oily fluid. It is definitely not normal watery condensation dripping from the A/C unit. I double checked all my fluid levels. brake fluid,engine oil, tranny fluid, power steering etc. These fluids all have obvious colors and all were filled to normal levels. I had been running my A/C but have since shut it off to minimize the risk of damaging important parts like the compressor. The fluid does not appear to be coming from the compressor. Do you have any idea what part it may be leaking from or what this may cost to repair?