What is the difference in the net carrying value between customer relationships and developed technology?
{"Customer relationships": {"Gross Carrying Amount": 123731.0, "Accumulated Amortization": -39335.0, "Net Carrying Value": 84396.0, "Weighted- Average Remaining Life": 9.8}, "Developed technology": {"Gross Carrying Amount": 30542.0, "Accumulated Amortization": -13722.0, "Net Carrying Value": 16820.0, "Weighted- Average Remaining Life": 8.7}, "Trade name": {"Gross Carrying Amount": 3304.0, "Accumulated Amortization": -1082.0, "Net Carrying Value": 2222.0, "Weighted- Average Remaining Life": 4.8}, "Other": {"Gross Carrying Amount": 234, "Accumulated Amortization": -234, "Net Carrying Value": "\u2014", "Weighted- Average Remaining Life": "\u2014"}, "Total intangible assets": {"Gross Carrying Amount": 157811, "Accumulated Amortization": -54373, "Net Carrying Value": 103438, "Weighted- Average Remaining Life": ""}}
customer_net_carrying = df["Customer relationships"]["Net Carrying Value"]
developed_net_carrying = df["Developed technology"]["Net Carrying Value"]
answer = customer_net_carrying - developed_net_carrying