As of June 30, 2019, what is the Investment cost expressed as a percentage of total costs?
{"Deposits and restricted cash": {"As of June 30, 2019": 13671, "As of June 30, 2018": 9479}, "Deferred implementation costs": {"As of June 30, 2019": "\u2014", "As of June 30, 2018": 13740}, "Capitalized costs to obtain a contract": {"As of June 30, 2019": 35593, "As of June 30, 2018": 13027}, "Investments": {"As of June 30, 2019": 67002, "As of June 30, 2018": 49635}, "Long-term prepaid expenses and other long-term assets": {"As of June 30, 2019": 32711, "As of June 30, 2018": 25386}, "Total": {"As of June 30, 2019": 148977, "As of June 30, 2018": 111267}}
investment_cost = df["Investments"]["As of June 30, 2019"]
total_cost = df["Total"]["As of June 30, 2019"]
answer = investment_cost / total_cost * 100.0