Calculate the stock in the beginning in each of the alternative cases:
- Sales Rs 42,000; Purchases Rs 28,000; Closing Stock Rs 2,000; Gross Profit on sales 1/7
- Sales Rs 42,000; Purchases Rs 28,000; Closing Stock Rs 2,000; Gross Loss on sales 1/7
- Sales Rs 1,00,8000; Purchases Rs 67,200; Closing Stock Rs 4,800; Gross Profit on Cost 1/6
- Sales Rs 1,00,8000; Purchases Rs 67,200; Closing Stock Rs 4,800; Gross Loss on cost 1/8
