The standard mass of monosodium glutamate per bag is 100 grams, denoted as "0". In order to check whether the weight of monosodium glutamate is qualified, an inspector randomly checked 5 bags and recorded the data as follows: -2, +2, -5, +3, -4, what is the total weight of these 5 bags of monosodium glutamate in grams?
每袋味精的标准质量是100克，记作"0"．为了检验味精重量是否合格，一个检验员抽查了5袋，记录数据如下：-2，+2，-5，+3，-4，这5袋味精的总重量是多少克．
<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<gadget id="calculator">2 - 5</gadget>
<output>-3</output>

<gadget id="calculator">3 - 4</gadget>
<output>-1</output>

<gadget id="calculator">(-2) + (-3) + (-1)</gadget>
<output>-6</output>

<gadget id="calculator">500 + (-6)</gadget>
<output>494</output>

<result>494</result>