Final answer:
The gross profit margin ratio for Shedz is 33.33%.
Step-by-step explanation:
The gross profit margin ratio can be calculated using the formula:
Gross Profit Margin Ratio = (Gross Profit / Revenue) x 100
In the case of Shedz, the gross profit is £65,000 and the revenue (which is the same as the cost of sales) is £195,000. Plugging these values into the formula:
Gross Profit Margin Ratio = (65,000 / 195,000) x 100 = 33.33%
Therefore, the gross profit margin ratio for Shedz is 33.33%.