27 | Cash flow disclosures |
| Year ended December 31, | ||||||||||||||||
| (i) | Changes in working capital | 2017 | 2016 | 2015 | ||||||||||||
| Inventories | (804,415 | ) | 244,720 | 936,402 | ||||||||||||
| Receivables and prepayments and Current tax assets | (6,662 | ) | 70,874 | 60,009 | ||||||||||||
| Trade receivables | (259,375 | ) | 146,824 | 828,265 | ||||||||||||
| Other liabilities | 4,226 | (79,046 | ) | (123,904 | ) | |||||||||||
| Customer advances | 17,039 | (95,112 | ) | 1,171 | ||||||||||||
| Trade payables | 193,905 | 59,939 | (327,958 | ) | ||||||||||||
(855,282 | ) | 348,199 | 1,373,985 | |||||||||||||
(ii) | Income tax accruals less payments | |||||||||||||||
| Tax accrued | (17,136 | ) | 41,441 | 244,505 | ||||||||||||
| Taxes paid | (176,853 | ) | (169,520 | ) | (335,585 | ) | ||||||||||
(193,989 | ) | (128,079 | ) | (91,080 | ) | |||||||||||
(iii) | Interest accruals less payments, net | |||||||||||||||
| Interest accrued | (20,534 | ) | (43,872 | ) | (11,517 | ) | ||||||||||
| Interest received | 50,001 | 60,163 | 56,835 | |||||||||||||
| Interest paid | (17,917 | ) | (18,858 | ) | (18,696 | ) | ||||||||||
11,550 | (2,567 | ) | 26,622 | |||||||||||||
(iv) | Cash and cash equivalents | |||||||||||||||
| Cash at banks, liquidity funds and short - term investments | 330,221 | 399,900 | 286,547 | |||||||||||||
| Bank overdrafts | (131 | ) | (1,320 | ) | (349 | ) | ||||||||||
330,090 | 398,580 | 286,198 | ||||||||||||||