In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If asentence is free from error, select 'No Error'.
She picked (1)/ on the (2)/ trail soon after. (3)/ No error (4)
If the fixed costs of a factory producing candles is Rs 20,000, selling price is Rs 30 per dozen candles and variable cost is Rs 1.5 per candle, what is the break-even quantity?