Product 2 was released at the start of March.
Three months after release would be: March, April and May
We can see from the graph that there is a bar for the months Jan-Mar for product 2. However, since product 2 was only released at the start of March, all units sold in that bar would be for the month of March.
Units sold in March = 900
Sales = (900/100) x 2000 = £18000
Let sales in the first three months = ‘S’
Two-thirds of the sales were in March.
2/3 x S = £18000
S = £27,000
Sales in April and May = 27000 – 18000 = £9000
The bar for Apr-Jun gives us the sales from April to June (obviously).
Units of product sold from Apr-Jun = 800
Sales = (800/100) x 2000 = £16000
We know that sales in April and May were £9000
Therefore, sales in June = 16000-9000 = £7000
Therefore, the answer is D.