splits two$-$for$-$one in the last period.

$P_t$ represents price at time $t$ and $Q_t$ represents shares outstanding at time $t.$ Stock $C$

$\backslash$table$[[,P_{},Q_{},P_1,Q_1,P_2,Q_2$

$\left[\begin{array}{ccccccc}?& P0& Q0& P1& Q1& P2& Q2\\ A& 90& 100& 95& 100& 95& 100\\ B& 50& 200& 45& 200& 45& 200\\ C& 100& 200& 110& 200& 55& 400\end{array}\right]$