pre_text: (8) Computer Software Computer software, net consists of the following (in millions): In the fourth quarter of 2019, we entered into agreements to acquire software in exchange for a combination of cash consideration and certain of our products and services. The software was acquired for $32.0 million, of which software valued at $6.5 million was received as of December 31, 2019 and resulted in non-cash investing activity of $4.8 million.
table: December 31,
table: 2019 2018
table: Internally developed software $808.2 $746.0
table: Purchased software 78.9 60.7
table: Computer software 887.1 806.7
table: Accumulated amortization (481.1) (401.1)
table: Computer software, net $406.0 $405.6
question: Analyse this data from a financial earnings document. What was the change in purchased software between 2018 and 2019?