pre_text: Note 19 – Summarized Quarterly Financial Data (Unaudited) The following table presents unaudited quarterly operating results for each of our last eight fiscal quarters. This information has been prepared on a basis consistent with our audited financial statements and includes all adjustments, consisting only of normal recurring adjustments, considered necessary for a fair presentation of the data. UNAUDITED QUARTERLY OPERATING RESULTS (In thousands, except for per share amounts) (1) Assumes exercise of dilutive securities calculated under the treasury stock method.
table: Three Months Ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019
table: Net sales $143,791 $156,391 $114,092 $115,787
table: Gross profit $60,612 $65,015 $46,331 $47,209
table: Operating income (loss) $(6,167) $562 $(20,288) $(14,070)
table: Net income (loss) $770 $3,995 $(46,123) $(11,624)
table: Earnings (loss) per common share - basic $0.02 $0.08 $(0.96) $(0.25)
table: Earnings (loss) per common share - diluted $0.02(1) $0.08(1) $(0.96) $(0.25)
question: Analyse this data from a financial earnings document. What was the change in gross profit between  Three Months Ended  March 31, 2019 and June 30, 2019?