Martha Duvall keeps records of family expenses. Total monthly expenses for September, October, and November were $1,026.60, $1,352.75, and $1,128.25, respectively. What was their average monthly expenditure for these months?

A (U.S.) business math course typically includes a review of elementary arithmetic, including fractions, decimals, and percentages. Elementary algebra is often included as well, in the context of solving practical business problems.