1. **Problem statement:** Calculate the total net salary paid by company "A" in December based on the given employee data. 2. **Given data:** - Sarna: Base salary 2,500,000, worked 158 hours out of 160 - Zaya: Base salary 1,800,000, worked 160 hours out of 160 - Zulaa: Base salary 1,200,000, worked 156 hours out of 160 - Suren: Base salary 1,000,000, worked 154 hours out of 160 3. **Formula for salary based on hours worked:** $$\text{Salary} = \text{Base salary} \times \frac{\text{Hours worked}}{\text{Hours to work}}$$ 4. **Calculate each employee's salary:** - Sarna: $$2,500,000 \times \frac{158}{160} = 2,500,000 \times 0.9875 = 2,468,750$$ - Zaya: $$1,800,000 \times \frac{160}{160} = 1,800,000 \times 1 = 1,800,000$$ - Zulaa: $$1,200,000 \times \frac{156}{160} = 1,200,000 \times 0.975 = 1,170,000$$ - Suren: $$1,000,000 \times \frac{154}{160} = 1,000,000 \times 0.9625 = 962,500$$ 5. **Sum all salaries to find total payout:** $$2,468,750 + 1,800,000 + 1,170,000 + 962,500 = 6,401,250$$ 6. **Check options:** None match 6,401,250, so consider that deductions (НДШ, ХХОАТ) or overtime (ОТЦ) might be missing or zero. 7. Since no deductions or overtime values are given, assume net pay equals calculated salaries. 8. The question asks for total net pay, but options are around 5 million, so possibly a mistake or missing deductions. 9. Recalculate assuming deductions reduce total by about 20% (typical for social and income tax): $$6,401,250 \times 0.8 = 5,121,000$$ 10. Closest option to this is a. 5,158,596₮. **Final answer:** a. 5,158,596₮