Final answer:
The cost types T2 and T3 are classified as semi-variable costs.
Step-by-step explanation:
The cost types that would be classified as semi-variable are T2 and T3.
A semi-variable cost, also known as a mixed cost, is a cost that has both fixed and variable components. In this case, T2 and T3 have different costs at each production level, indicating that there is a fixed component that remains constant and a variable component that varies with the level of production.
For example, at 125 units of production, the total cost for T2 is £1750, while at 180 units of production, the total cost increases to £2520. This shows that there is a fixed cost component of £1750 - £1600 = £150, and a variable cost component of £2520 - £1750 = £770. The same logic applies to T3, where there is a fixed cost component of £2475 - £1600 = £875, and a variable cost component of £2826 - £2475 = £351.