$130700$ is correct !
$ub_2$ = upper bound index on columns
$\begin{align*} &\Rightarrow \text{LOC}\left ( a[X][Y] \right ) = \text{BA} + \left ( \frac{\text{n}\_\text{row}(\text{n}\_\text{row}+1)}{2} - \frac{(\text{ub}_1 - X +1)(\text{ub}_1 - X +2)}{2} + Y-X \right )*E \\ & \Rightarrow \text{LOC}\left ( a[X][Y] \right ) = 0 + \left ( \frac{51*52}{2} - \frac{6*7}{2} + 2 \right )*100 \\ & \Rightarrow \text{LOC}\left ( a[X][Y] \right ) = 130700 \\ \end{align*}$
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