When my mother cooks lunch after get off work, it takes 8 minutes for her to choose and wash vegetables, 3 minutes for cutting vegetables, 10 minutes for cooking, and 4 minutes for stir-frying. How many minutes does it take mother to cook this meal at least?
妈妈下班做午饭，她择菜和洗菜要8分钟，切菜要3分钟，煮饭要10分钟，炒菜要4分钟，妈妈做这顿饭最少要用多少分钟．
<gadget id="calculator">4 - 10</gadget>
<output>-6</output>

<gadget id="calculator">10 + 8 + 3 + (-6)</gadget>
<output>15</output>

<result>15</result>