What was the change in Total operating income in the Communications Solutions segment in 2019 from 2018?
{"": {"2019": "", "2018": "(in millions)"}, "Restructuring and other charges, net": {"2019": 48, "2018": 13}, "Other items": {"2019": 1, "2018": "\u2014"}, "Total": {"2019": 49, "2018": 13}}
total_2019 = df["Total"]["2019"]
restructuring_and_other_charges_net_2018 = df["Restructuring and other charges, net"]["2018"]
answer = total_2019 - restructuring_and_other_charges_net_2018