If the marginal propensity to consume is 0.80 and the investment expenditure changes from N100 million to ₦140 million in a given economy, find the level of equilibrium in the given economy, using the formula: K = 1/(1-MPC)
where (K = multiplier, MPC = Marginal Propensity to Consume)

• A.₦20 million
• B.₦40 million
• C.₦28 million
• D.₦200 million