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The question asks for the net salary of Alberto, given the following information:

- Alberto's gross salary is C$54,321.
- The INSS (Instituto Nicaragüense de Seguridad Social) deduction is 6.25%.
- In addition, 17.77% is retained as income tax (IR - Impuesto sobre la Renta).

### Step-by-step Solution:

1. **INSS Deduction:**
   The INSS deducts 6.25% from the gross salary:
   \[
   \text{INSS deduction} = 54,321 \times 0.0625 = 3,395.06
   \]

2. **Salary After INSS Deduction:**
   \[
   \text{Salary after INSS} = 54,321 - 3,395.06 = 50,925.94
   \]

3. **Income Tax (IR) Deduction:**
   The income tax (IR) deduction is 17.77% applied to the salary after the INSS deduction:
   \[
   \text{IR deduction} = 50,925.94 \times 0.1777 = 9,045.53
   \]

4. **Net Salary:**
   The net salary is the salary after INSS and IR deductions:
   \[
   \text{Net salary} = 50,925.94 - 9,045.53 = 41,880.41
   \]

### Conclusion:
Alberto's net salary is **C$41,880.41**.

Let me know if you need any clarifications or further details! 

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Here are 5 related questions to expand on this problem:
1. How would the net salary change if the INSS rate were 5% instead of 6.25%?
2. What would be the net salary if no income tax (IR) were deducted?
3. How does the salary structure change if the gross salary is C$60,000 with the same deductions?
4. What is the total percentage deduction applied to Alberto's salary?
5. How would the net salary be affected if the income tax (IR) rate increased to 20%?

**Tip**: It's always good to verify tax brackets and deductions yearly, as they may change according to local regulations.

El INSS deduce al salario bruto de un trabajador el 6.25%. ¿Cuál es el salario neto de Alberto, si tiene un salario bruto de C$54,321, del cual además de la deducción del Seguro Social, se le retiene 17.77% en concepto de IR?

Learn how to calculate the net salary of a worker with a gross salary of C$54,321, after applying a 6.25% INSS deduction and a 17.77% income tax (IR) deduction. This detailed step-by-step guide covers key mathematical concepts related to percentage deductions.

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