Total spent = Refrigerator + TV.<br><br>The diagram shows the total $3100 with two expense portions subtracted.<br><br>&bull; Total spent = $1250 + $950 = $2200<br>&bull; Money left = $3100 &minus; $2200 = $900<br><br>Mrs Rex had $900 left.<br>Check: $2200 + $900 = $3100. &#10003;