Find consumption expenditure from the following:

Autonomous consumption = Rs.100

Marginal Propensity to Consume =0.70

National Income =Rs.1000

Here, $\overline{S}$ =Rs. 100, b = 0.7 and Y = Rs.1000

So, consumption expenditure © = $\overline{S}$ + bY = 100 + 0.7 x 1000

= 100 +700 = Rs.800