71.
With reference to the theory of contribution, which of the following statement is/are correct?
1. Contribution is the excess of sales over variable costs
2. Contribution is the excess of sales over total costs
Select the correct answer:

72.
Which of the following statements is correct in regards to life-cycle costing?
1. It analyses the process of evaluating product profitability.
2. It helps planners to control costs more effectively.

78.
If original cost of a machine is Rs. 1,26,000 and its scrap value is Rs. 6000. what will be the amount of depreciation for II yr by using WDV method

79.
X and Y sharing profits in the ratio of 7 : 3, admit Z for $${\frac{3}{7}^{{\text{th}}}}$$ share in the new firm in which he takes $${\frac{2}{7}^{{\text{th}}}}$$ from X and $${\frac{1}{7}^{{\text{th}}}}$$ form Y. The new ratio of X, Y and Z will be

80.
The loss prior to incorporation cannot be treated