What was the percentage change in Dell subsidiary support and administrative costs between 2019 and 2020?
{"Purchases and leases of products and purchases of services(1)": {"January 31, 2020": 242, "February 1, 2019": 200, "February 2, 2018": 142}, "Dell subsidiary support and administrative costs": {"January 31, 2020": 119, "February 1, 2019": 145, "February 2, 2018": 212}}
dell_subsidiary_support_and_administrative_costs_2020 = df["Dell subsidiary support and administrative costs"]["January 31, 2020"]
dell_subsidiary_support_and_administrative_costs_2019 = df["Dell subsidiary support and administrative costs"]["February 1, 2019"]
answer = (dell_subsidiary_support_and_administrative_costs_2020 - dell_subsidiary_support_and_administrative_costs_2019) / dell_subsidiary_support_and_administrative_costs_2019 * 100.0