The following is a list of 11 measurements.
100, 26, -81, -3, 89, -25, 95, -21, -100, -100, -99
Suppose that these 11 measurements are respectively labeled $x_1, x_2, ..., x_{11}$. (Thus, 100 is labeled $x_1$, 26 is labeled $x_2$, and so on.) Compute the following.
$\sum_{i=1}^{11} -33x_i$