Table:
| Three Months Ended | March 31, 2019 | June 30, 2019 | September 30, 2019 | December 31, 2019 |
| --- | --- | --- | --- | --- |
| Net sales | $143,791 | $156,391 | $114,092 | $115,787 |
| Gross profit | $60,612 | $65,015 | $46,331 | $47,209 |
| Operating income (loss) | $(6,167) | $562 | $(20,288) | $(14,070) |
| Net income (loss) | $770 | $3,995 | $(46,123) | $(11,624) |
| Earnings (loss) per common share - basic | $0.02 | $0.08 | $(0.96) | $(0.25) |
| Earnings (loss) per common share - diluted | $0.02(1) | $0.08(1) | $(0.96) | $(0.25) |
Paragraphs:
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.
Question:
What was the change in gross profit between  Three Months Ended  March 31, 2019 and June 30, 2019?
Answer: $65015-$60612 = 4403