In the store, stationery boxes are 12 yuan each, school bags are 25 yuan each, pens are 14 yuan each, and triangle rulers are 3.50 yuan each. What stationery can I buy with 30 yuan? (At least two kinds of stationery should be considered)
商店里文具盒每个12元，书包每个25元，钢笔每支14元，三角尺每副3.50元．用30元钱，可以买到哪些文具？(至少要考虑两种以上文具)
<result>30</result>