Problem
A consumer spends all her income on the two goods A and B. The quantity of good A bought is determined by the demand function QA = f(PA, PB,M) where PA and PB are the prices of the two goods and M is real income. A change in the price of A will also affect real income M via the function M = g(PA, PB, £M) where £M is money income. Derive an expression for the total effect of a change in PA on QA.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.