When sales =£ 1,80,000 purchase =£ 1,60,000 opening stock =£ 34,000 and rate of the gross profit is 20% on cost the closing stock would be?

Cost of sale = (180000/120)*100=150,000.

Opening Stock= 34,000

add: Purchase= 160,000

Less: cost of sale= (150,000)

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Closing Stock  = 44,000.