Prepare the contract account for the year ended 31st March, 2009, including the calculation of depreciation on plant.

Here are the solutions for the contract accounting problem:

Part (i): Prepare the contract account for the year ended 31st March, 2009.

To prepare the contract account, we list all direct costs, indirect costs, and depreciation on the debit side. On the credit side, we account for materials returned, closing materials at site, and the value of work-in-progress (work certified and work not certified).

First, calculate the depreciation on the plant:

$$\text{Annual Depreciation} = \frac{\text{Cost of Plant} - \text{Residual Value}}{\text{Useful Life}}$$ $$$$