
	Weighted average useful life (years)		Adoption IFRS 16		Additions and remeasurement		Write-offs			Transfer			Effect of foreign currency exchange rate variation		Amortization			Balance on 12/31/2019
Cost:
Real estate		7		1,636,330		308,622		(55,605	)		98,043			80,930		—			2,068,320
Port area (*)		—		—		68,007		—			—			—		—			68,007
Other		4		95,097		26,235		(1,981	)		27,847			4,272		—			151,470

				1,731,427		402,864		(57,586	)		125,890			85,202		—			2,287,797

Accumulated amortization:
Real estate				—		—		6,682			—			36		(262,750	)		(256,032	)
Port area				—		—		—			—			—		—			0
Other				—		—		442			(14,068	)		81		(37,308	)		(50,853	)

				—		—		7,124			(14,068	)		117		(300,058	)		(306,885	)

Net amount				1,731,427		402,864		(50,462	)		111,822			85,319		(300,058	)		1,980,912

(*)	Refers to the port concession grants (area port lease), of which R$ 68,007 was paid by subsidiaries of the Company until the 4 th quarter of 2019 (see Note 35.c).

The changes in leases payable are shown below:


Balance as of December 31, 2018	46,066
Adoption IFRS 16	1,363,803
Interest accrued	128,996
Payments	(321,716	)
Additions and remeasurement	334,857
Write-offs	(52,129	)
Effect of foreign currency exchange rate variation	88,796

Balance as of December 31, 2019	1,588,673

Current	206,396
Non-current	1,382,277

The future disbursements (installments), assumed under these contracts, amount approximately to: