What percentage of total cost does stock compensation form a part of?
{"Specialty egg": {"June 1, 2019": 53263.0, "June 2, 2018": 54300.0, "Change": -1037.0, "Percent Change": -1.9}, "Delivery expense": {"June 1, 2019": 53595.0, "June 2, 2018": 53177.0, "Change": 418.0, "Percent Change": 0.8}, "Payroll and overhead": {"June 1, 2019": 38343.0, "June 2, 2018": 37191.0, "Change": 1152.0, "Percent Change": 3.1}, "Stock compensation": {"June 1, 2019": 3619.0, "June 2, 2018": 3467.0, "Change": 152.0, "Percent Change": 4.4}, "Other expenses": {"June 1, 2019": 25975.0, "June 2, 2018": 31181.0, "Change": -5206.0, "Percent Change": -16.7}, "Total": {"June 1, 2019": 174795.0, "June 2, 2018": 179316.0, "Change": -4521.0, "Percent Change": -2.5}}
stock_compensation = df["Stock compensation"]["June 1, 2019"]
total_cost = df["Total"]["June 1, 2019"]
answer = stock_compensation / total_cost * 100.0