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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Inventories Net | Inventories as of December 31, 2016 and 2017, are as follows:
|  | 2016 |  |  | 2017 |
(In millions of Korean won) |  | Acquisition cost |  |  | Valuation allowance |  |  | Book amount |  |  | Acquisition cost |  |  | Valuation allowance |  |  | Book amount |
Merchandise |  | ￦ | 403,938 |  |  | ￦ | (46,634 | ) |  | ￦ | 357,304 |  |  | ￦ | 504,321 |  |  | ￦ | (58,293 | ) |  | ￦ | 446,028 |
Others |  |  | 97,778 |  |  |  | (494 | ) |  |  | 97,284 |  |  |  | 195,999 |  |  |  | — |  |  |  | 195,999 |
Total |  | ￦ | 501,716 |  |  | ￦ | (47,128 | ) |  | ￦ | 454,588 |  |  | ￦ | 700,320 |  |  | ￦ | (58,293 | ) |  | ￦ | 642,027 |

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