What was the change in Repairs and maintenance costs in 2019 from 2018?
{"Cost Data: -- Repairs and maintenance costs": {"2019": 120.4, "2018": 108.0, "2017": 99.1}, "Noncash investing and financing activities: -- Noncash purchases of property, plant, equipment and software": {"2019": 16.1, "2018": 16.5, "2017": 13.7}, "Cash paid (received) during the year for: -- Interest payments, net": {"2019": 27.6, "2018": 29.5, "2017": 27.7}, "Cash paid (received) during the year for: -- Income tax payments (refunds), net": {"2019": 27.5, "2018": 33.7, "2017": -33.3}}
cost_data_repairs_and_maintenance_costs_2019 = df["Cost Data: -- Repairs and maintenance costs"]["2019"]
cost_data_repairs_and_maintenance_costs_2018 = df["Cost Data: -- Repairs and maintenance costs"]["2018"]
answer = cost_data_repairs_and_maintenance_costs_2019 - cost_data_repairs_and_maintenance_costs_2018