What is the change in Capitalized Software from 2020 to 2021?
{"2020": {"Purchased Intangible Assets": 2582, "Capitalized Software": 3522}, "2021": {"Purchased Intangible Assets": 2560, "Capitalized Software": 2790}, "2022": {"Purchased Intangible Assets": 2560, "Capitalized Software": 1420}, "2023": {"Purchased Intangible Assets": 2560, "Capitalized Software": 528}, "Thereafter": {"Purchased Intangible Assets": 12012, "Capitalized Software": 89}, "Total": {"Purchased Intangible Assets": 22274, "Capitalized Software": 8349}}
capitalized_software_2021 = df["2021"]["Capitalized Software"]
capitalized_software_2020 = df["2020"]["Capitalized Software"]
answer = capitalized_software_2021 - capitalized_software_2020