What is the change in Computer equipment from March 31, 2018 to March 31, 2019?
{"Computer equipment": {"2019": 4754, "2018": 4713}, "Less: Accumulated amortization": {"2019": -2228, "2018": -990}, "": {"2019": 2526, "2018": 3723}}
computer_equipment_2019 = df["Computer equipment"]["2019"]
computer_equipment_2018 = df["Computer equipment"]["2018"]
answer = computer_equipment_2019 - computer_equipment_2018