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Costs and expenses by nature (Tables)
 6 Months Ended
Jun. 30, 2023
Notes and other explanatory information [abstract]  
Schedule of Cost of sales
       
  Jan-Jun/2023 Jan-Jun/2022 Apr-Jun/2023 Apr-Jun/2022
Raw material, products for resale, materials and third-party services (1) (12,782) (13,769) (5,687) (8,008)
Depreciation, depletion and amortization (4,952) (5,344) (2,556) (2,782)
Production taxes (5,477) (8,093) (2,694) (4,029)
Employee compensation (789) (813) (405) (421)
Total (24,000) (28,019) (11,342) (15,240)

 

(1) It Includes short-term leases and inventory turnover.
Schedule of Selling expenses
       
  Jan-Jun/2023 Jan-Jun/2022 Apr-Jun/2023 Apr-Jun/2022
Materials, third-party services, freight, rent and other related costs (2,048) (1,948) (1,022) (1,000)
Depreciation, depletion and amortization (304) (417) (154) (217)
Allowance for expected credit losses (17) (14) 4 (6)
Employee compensation (52) (46) (28) (24)
Total (2,421) (2,425) (1,200) (1,247)
Schedule of General and administrative expenses
       
  Jan-Jun/2023 Jan-Jun/2022 Apr-Jun/2023 Apr-Jun/2022
Employee compensation (473) (414) (244) (216)
Materials, third-party services, rent and other related costs (214) (161) (112) (83)
Depreciation, depletion and amortization (58) (47) (32) (24)
Total (745) (622) (388) (323)