Typo 1:
There's a minor typo in Equation (69.6). The equations written are:
$$
\begin{aligned}
C_{yt} &= \beta \Bigl[ W_t (1 - \tau_t) - \delta_{yt} - \frac{\delta_{ot}}{1 + r_{t+1}(1 - \tau_{t+1})} \Bigr], \\
\frac{C_{0,t+1}}{1 + r_{t+1}(1 - \tau_{t+1})} &= (1 - \beta) \Bigl[ W_t (1 - \tau_t) - \delta_{yt} - \frac{\delta_{ot}}{1 + r_{t+1}(1 - \tau_{t+1})} \Bigr].
\end{aligned}
$$
The correct version should be:
$$
\begin{aligned}
C_{yt} &= \beta \Bigl[ W_t (1 - \tau_t) - \delta_{yt} - \frac{\delta_{ot}}{1 + r_{t+1}(1 - \tau_{t+1})} \Bigr], \\
\frac{C_{o,t+1}}{1 + r_{t+1}(1 - \tau_{t+1})} &= (1 - \beta) \Bigl[ W_t (1 - \tau_t) - \delta_{yt} - \frac{\delta_{ot}}{1 + r_{t+1}(1 - \tau_{t+1})} \Bigr].
\end{aligned}
$$
TLDR: Replace 0 in $C_{0,t+1}$ with o. So it should be $C_{o,t+1}$
