What was the difference in the fair value of cash paid for acquisition between Trek and Electrostatic Product Line?
{"Cash paid for acquisition": {"Trek": 11723, "Electrostatic Product Line": 3000, "LumaSense": 94946, "Total": 109669}, "Less cash acquired": {"Trek": -5651, "Electrostatic Product Line": "\u2014", "LumaSense": -10262, "Total": -15913}, "Total purchase price": {"Trek": 6072, "Electrostatic Product Line": 3000, "LumaSense": 84684, "Total": 93756}}
cash_trek = df["Cash paid for acquisition"]["Trek"]
cash_epl = df["Cash paid for acquisition"]["Electrostatic Product Line"]
answer = cash_trek - cash_epl