What is the total amortized cost of agency bonds and corporate bonds?
{"Current assets: -- Cash": {"Amortized Cost": 67818, "Unrealized Gains": "$\u2014", "Unrealized Losses": "$\u2014", "Fair Value": 67818}, "Cash equivalents: -- Money market funds": {"Amortized Cost": 126075, "Unrealized Gains": "\u2014", "Unrealized Losses": "\u2014", "Fair Value": 126075}, "Cash equivalents: -- Corporate bonds": {"Amortized Cost": 1000, "Unrealized Gains": "\u2014", "Unrealized Losses": "\u2014", "Fair Value": 1000}, "Cash equivalents: -- Agency bonds": {"Amortized Cost": 6485, "Unrealized Gains": 1, "Unrealized Losses": "\u2014", "Fair Value": 6486}, "Cash equivalents: -- Commercial paper": {"Amortized Cost": 9609, "Unrealized Gains": "\u2014", "Unrealized Losses": -1, "Fair Value": 9608}, "Cash equivalents: -- Certificates of deposit": {"Amortized Cost": 171, "Unrealized Gains": "\u2014", "Unrealized Losses": "\u2014", "Fair Value": 171}, "Cash equivalents: -- US treasury securities": {"Amortized Cost": 4749, "Unrealized Gains": "\u2014", "Unrealized Losses": "\u2014", "Fair Value": 4749}, "Cash equivalents: -- Total cash equivalents": {"Amortized Cost": 148089, "Unrealized Gains": 1, "Unrealized Losses": -1, "Fair Value": 148089}, "Cash equivalents: -- Total cash and cash equivalents": {"Amortized Cost": 215907, "Unrealized Gains": 1, "Unrealized Losses": -1, "Fair Value": 215907}, "Short-term investments: -- Corporate bonds": {"Amortized Cost": 103130, "Unrealized Gains": 110, "Unrealized Losses": -7, "Fair Value": 103233}, "Short-term investments: -- Agency bonds": {"Amortized Cost": 3966, "Unrealized Gains": 2, "Unrealized Losses": "\u2014", "Fair Value": 3968}, "Short-term investments: -- US treasury securities": {"Amortized Cost": 50703, "Unrealized Gains": 62, "Unrealized Losses": -1, "Fair Value": 50764}, "Short-term investments: -- Commercial paper": {"Amortized Cost": 23827, "Unrealized Gains": 1, "Unrealized Losses": "\u2014", "Fair Value": 23828}, "Short-term investments: -- Certificates of deposit": {"Amortized Cost": 3936, "Unrealized Gains": 2, "Unrealized Losses": -1, "Fair Value": 3937}, "Short-term investments: -- Asset-backed securities": {"Amortized Cost": 15837, "Unrealized Gains": 12, "Unrealized Losses": "\u2014", "Fair Value": 15849}, "Short-term investments: -- Total short-term investments": {"Amortized Cost": 201399, "Unrealized Gains": 189, "Unrealized Losses": -9, "Fair Value": 201579}, "Long-term investments: -- Corporate bonds": {"Amortized Cost": 19407, "Unrealized Gains": 12, "Unrealized Losses": -4, "Fair Value": 19415}, "Long-term investments: -- US treasury securities": {"Amortized Cost": 19300, "Unrealized Gains": 25, "Unrealized Losses": "\u2014", "Fair Value": 19325}, "Long-term investments: -- Asset-backed securities": {"Amortized Cost": 11693, "Unrealized Gains": 10, "Unrealized Losses": -1, "Fair Value": 11702}, "Long-term investments: -- Strategic investments": {"Amortized Cost": 9750, "Unrealized Gains": "\u2014", "Unrealized Losses": "\u2014", "Fair Value": 9750}, "Long-term investments: -- Total long-term investments": {"Amortized Cost": 60150, "Unrealized Gains": 47, "Unrealized Losses": -5, "Fair Value": 60192}}
agency_bonds_amortized_cost = df["Cash equivalents: -- Agency bonds"]["Amortized Cost"]
corporate_bonds_amortized_cost = df["Cash equivalents: -- Commercial paper"]["Amortized Cost"]
answer = agency_bonds_amortized_cost + corporate_bonds_amortized_cost