| | December 31, 2017 | | |||||||
| | Less than 1 year | | 1 to 3 years | | 3 to 5 years | | |||
Trade payables, sundry creditors and expenses payable | | $ | 4,163,443 | | | - | | | - | |
Due to related parties | | | 55,252 | | | - | | | - | |
Derivative financial instruments | | | 6,821 | | | | | | | |
| | | | | | | | | | |
Variable-rate maturities | | | | | | | | | | |
In U.S. dollars | | | 2,752,400 | | | | | | - | |
In pesos | | | 942,651 | | | 53,973 | | | 1,500,000 | |
Interest | | | 162,785 | | | 244,484 | | | 203,840 | |
Total financial liabilities | | $ | 8,083,352 | | | 298,457 | | | 1,703,840 | |
| | December 31, 2016 | | |||||||
| | Less than 1 year | | 1 to 3 years | | 3 to 5 years | | |||
Trade payables, sundry creditors and expenses payable | | $ | 4,095,089 | | | - | | | - | |
Due to related parties | | | 189,966 | | | - | | | - | |
Variable-rate maturities | | | | | | | | | | |
In U.S. dollars | | | 1,444,800 | | | - | | | - | |
In pesos | | | 1,652,725 | | | 950,412 | | | - | |
Interest | | | 142,100 | | | 136,859 | | | - | |
Total financial liabilities | | $ | 7,524,680 | | | 1,087,271 | | | - | |
| | December 31, 2015 | | |||||||
| | Less than 1 year | | 1 to 3 years | | 3 to 5 years | | |||
Trade payables, sundry creditors and expenses payable | | $ | 4,088,989 | | | - | | | - | |
Variable-rate maturities | | | | | | | | | | |
In U.S. dollars | | | 1,462,850 | | | - | | | - | |
In pesos | | | 169,033 | | | 2,495,127 | | | - | |
Interest | | | 113,840 | | | 98,840 | | | - | |
Total financial liabilities | | $ | 5,834,712 | | | 2,593,967 | | | - | |