26. Net revenue from sale and services

	2020		2019		2018
Gross revenue from sale	86,754,003		94,296,759		94,693,178
Gross revenue from services	929,304		869,084		750,791
Sales taxes ⁽ⁱ⁾	(4,291,081	)	(4,031,295	)	(3,027,597	)
Discounts and sales returns	(1,871,825	)	(1,494,814	)	(1,342,799	)
Amortization of contractual assets with customers (see Note 11)	(289,436	)	(355,250	)	(371,825	)
Deferred revenue (see Note 23)	10,137		13,491		(3,765	)
Net revenue from sales and services	81,241,102		89,297,975		90,697,983

⁽ⁱ⁾ Presented as required by the Brazilian law.