pre_text: ADVANCED ENERGY INDUSTRIES, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (continued) (in thousands, except per share amounts) NOTE 23. SUPPLEMENTAL QUARTERLY FINANCIAL DATA (UNAUDITED) The following tables present unaudited quarterly results for each of the eight quarters in the periods ended December 31, 2019 and 2018, in thousands. We believe that all necessary adjustments have been included in the amounts stated below to present fairly such quarterly information. Due to the volatility of the industries in which our customers operate, the operating results for any quarter are not necessarily indicative of results for any subsequent period.
table: Quarter Ended
table: December 31, 2019 September 30, 2019 June 30, 2019 March 31, 2019
table: Sales, net $  338,268 $  175,127 $ 134,810 $ 140,743
table: Gross Profit $112,295 $73,491 $64,126 $65,740
table: Restructuring Expense $1,418 $152 $1,795 $1,673
table: Operating income $22,202 $9,390 $11,005 $11,791
table: Income from continuing operations, net of income taxes $  10,479 $  7,256 $ 23,373 $ 15,387
table: Loss (income) from discontinued operations, net of income taxes $  (210) $  375 $ 8,324 $ (9)
table: Net Income $  10,269 $  7,631 $ 31,697 $ 15,378
table: Income from continuing operations attributable to noncontrolling interest $  5 $  10 $ 11 $ 8
table: Net income attributable to Advanced Energy Industries, Inc. $  10,264 $  7,621 $ 31,686 $ 15,370
table: Earnings (Loss) Per Share:
table: Continuing Operations:
table: Basic earnings per share $  0.27 $  0.19 $ 0.61 $ 0.40
table: Diluted earnings per share $  0.27 $  0.19 $ 0.61 $ 0.40
table: Discontinued Operations:
table: Basic loss per share $  (0.01) $  0.01 $ 0.22 $ —
table: Diluted loss per share $  (0.01) $  0.01 $ 0.22 $ —
table: Net Income:
table: Basic earnings per share $  0.27 $  0.20 $ 0.83 $ 0.40
table: Diluted earnings per share $  0.27 $  0.20 $ 0.82 $ 0.40
question: Analyse this data from a financial earnings document. What was the change in gross profit between Quarter Ended  March and June?