A company produced 1500 units at a total cost of ₹1,20,000. It donated 300 units to an NGO. For the rest, it announced a 15% discount on the market price of ₹110 per unit. It also offered 3 units free for every 10 units purchased. If all 1500 units were distributed, what is the overall gain or loss percentage?

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1. **Cost per unit:** $\frac{120000}{1500}=80$.  
2. **Units for sale:** $1500-300=1200$. With 3 free per 10 paid, paid units = $1200	imes\frac{10}{13}=\frac{12000}{13}\approx923.0769$.  
3. **Selling price:** $110	imes0.85=93.5$. Revenue = $\frac{12000}{13}	imes93.5=\frac{1,122,000}{13}\approx86{,}307.69$.  
4. **Loss and %:** Loss = $120000-86{,}307.69=33{,}692.31$. Loss% = $\frac{33{,}692.31}{120000}	imes100\approx28.08\%$.

FINAL_ANSWER: c

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