Invoice Mathematician in Brazil Brasília –Free Word Template Download with AI
Professional Mathematician Services — Brazil Brasília
OFFICIAL DOCUMENTDr. Helena Vasconcelos — Mathematician
Av. Paulista, 1578 — Sala 42
Brasília, DF — CEP 70040-000
Brazil
CNPJ: 12.345.678/0001-90
Phone: +55 (61) 3333-4455
Email: [email protected]
Billed To (Client)
Empresa Nacional de Engenharia e Cálculo Ltda.
SHIS QI 05, Bloco C, Sala 210
Brasília, DF — CEP 71610-050
Brazil
CNPJ: 98.765.432/0001-10
Attn: Sr. Ricardo Almeida, Director of Operations
Email: [email protected]
Provided By (Mathematician)
Dr. Helena Vasconcelos
PhD in Applied Mathematics, University of Brasília (UnB)
Specialization: Numerical Analysis & Optimization
Professional Registration: CREA-DF 123456
Av. Paulista, 1578 — Sala 42
Brasília, DF — CEP 70040-000
Brazil
| # | Description of Mathematical Services | Reference | Hours | Rate (BRL) | Amount (BRL) |
|---|---|---|---|---|---|
| 01 | Advanced numerical modeling and simulation for structural engineering analysis. The Mathematician performed finite element method computations to validate load-bearing calculations for a new commercial building project in the Plano Piloto district of Brasília. | PO-2025-0381 | 40 | R$ 450,00 | R$ 18.000,00 |
| 02 | Optimization algorithm development for logistics routing. The Mathematician designed and implemented a mixed-integer linear programming model to minimize transportation costs across the Federal District of Brazil Brasília and surrounding municipalities. | PO-2025-0382 | 32 | R$ 450,00 | R$ 14.400,00 |
| 03 | Statistical analysis and risk assessment consulting. The Mathematician conducted Bayesian inference and Monte Carlo simulations to evaluate project risk factors for the client's infrastructure expansion plan in Brazil Brasília. | PO-2025-0383 | 24 | R$ 450,00 | R$ 10.800,00 |
| 04 | Mathematical proof verification and peer review of engineering formulas. The Mathematician reviewed and validated differential equation solutions used in the client's hydraulic engineering documentation, ensuring compliance with ABNT standards. | PO-2025-0384 | 16 | R$ 450,00 | R$ 7.200,00 |
| 05 | On-site technical consultation and team training in Brasília. The Mathematician conducted two full-day workshops for the client's engineering staff on applied mathematics techniques, covering matrix algebra, eigenvalue problems, and computational methods relevant to their operations in Brazil Brasília. | PO-2025-0385 | 16 | R$ 500,00 | R$ 8.000,00 |
| Subtotal | R$ 58.400,00 |
| ISS (Imposto Sobre Serviços) — 5% | R$ 2.920,00 |
| PIS / COFINS — 3,65% | R$ 2.131,60 |
| Discount (Early Payment — 2%) | - R$ 1.168,00 |
| GRAND TOTAL | R$ 62.283,60 |
Payment Terms & Instructions
Method: Bank Transfer (TED/PIX) to the account of Dr. Helena Vasconcelos, Mathematician.
Bank: Banco do Brasil S.A. — Agência 1234-5 — Conta Corrente 98765-4
PIX Key: [email protected]
Due Date: 15 July 2025 (30 days from the date of this Invoice).
Penalty for Late Payment: 1% per month of interest plus 2% fine, as per Brazilian Civil Code (Código Civil, Art. 412).
Note: This Invoice must be referenced in all payment communications. Please include the Invoice number INV-2025-BB-00472 in the transfer description.
Important Notes
1. This Invoice is issued in accordance with the Brazilian tax regulations applicable to professional services rendered in the Federal District of Brazil Brasília. The ISS (Imposto Sobre Serviços) is levied by the Secretaria de Fazenda do Distrito Federal.
2. The Mathematician, Dr. Helena Vasconcelos, holds a valid professional registration and is authorized to provide mathematical consulting services throughout Brazil, with primary operations based in Brasília, DF.
3. All mathematical deliverables, including source code, model files, and analytical reports, are the intellectual property of the client upon full payment of this Invoice.
4. This document constitutes a valid fiscal document (Nota Fiscal de Serviço) for accounting and tax purposes in Brazil. A digital copy is available upon request via the SEFAZ-DF portal.
5. Any disputes arising from this Invoice shall be resolved under the jurisdiction of the courts of Brasília, DF, Brazil, in accordance with applicable federal law.
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