Calculate total cost and cost per piece for glass and plates using conventional and ABC methods, given direct material and labor costs.

Here's the calculation for total cost and cost per piece using both methods:

Part (a): Existing (conventional) method
In the conventional method, overheads are allocated based on a single cost driver, which in this case will be total labor hours.

Step 1: Calculate Direct Materials Cost for each product.

• Glass: $4,000 \text{ pieces} \times \text{Rs. } 80/\text{piece} = \text{Rs. } 320,000$
• Plate: $6,000 pieces \times Rs. 60/piece = Rs. 360,000