RDP 7902: Financial Modelling in Australia Equation (9)

\begin{array}{l} y_{t} + Σ_{i = 1}^{n} A_{it - 1} - Σ_{i = 1}^{n} \frac{a_{i}}{a_{i} + b_{i}} A *_{it} - Σ_{i = 1}^{n} \frac{b_{i}}{a_{i} + b_{i}} A_{it - 1} \\ - Σ_{1}^{m} \frac{c_{i}}{c_{i} + d_{i}} C *_{it} - Σ_{1}^{m} \frac{d_{i =}}{c_{i} + d_{i}} C_{it - 1} \\ = [Σ_{i = 1}^{n} \frac{1}{a_{i} + b_{i}} + Σ_{i = 1}^{m} \frac{1}{c_{i} + d_{i}}] λ^{'} \end{array}