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Other Expense (Income), Net | 9 Months Ended
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Feb. 28, 2019
Other Income And Expenses [Abstract] |
Other Expense (Income), Net | NOTE 8 — OTHER EXPENSE (INCOME), NET Other expense (income), net, consists of the following components:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | February 28, |  |  | February 28, |  |  | February 28, |  |  | February 28, |
(In thousands) |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Royalty expense, net |  | $ | 88 |  |  | $ | 148 |  |  | $ | 154 |  |  | $ | 238 |
(Income) related to unconsolidated equity affiliates |  |  | (133 | ) |  |  | (313 | ) |  |  | (299 | ) |  |  | (830 | )
Pension non-service costs |  |  | 372 |  |  |  | - |  |  |  | 1,146 |  |  |  | - |
Loss on extinguishment of debt (a) |  |  |  |  |  |  | - |  |  |  | 3,051 |  |  |  | - |
Other expense (income), net |  | $ | 327 |  |  | $ | (165 | ) |  | $ | 4,052 |  |  | $ | (592 | )
(a) | In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value measurement of the instrument on the date of conversion.

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