During the Spring Festival, the shopping mall holds a lottery activity. There are five different colors of lottery tickets in the lottery box. There are 32, 30, 28, 26, and 24 tickets respectively. You can draw as many tickets as you like each time, but you need to pay 2 yuan for each ticket Money, the reward method is as follows: exchange 15 same-color lottery coupons for an airplane model of the same color, exchange 11 same-color lottery coupons for a same-color tank model, and exchange 4 same-color lottery coupons for a same-color motorcycle Model. I would like to ask: How much should I pay at least to ensure that I can switch to three models, and the colors of the three models are different from each other?
新春佳节，商场举办抽奖活动，抽奖箱中有五种不同颜色的奖券，分别有32、30、28、26、24张，每次可以抽出任意多张，但每抽出一张就要付2元钱，奖励方式如下：用15张同色的奖券换一架相同颜色的飞机模型，用11张同色的奖券换一架相同颜色的坦克模型，用4张同色的奖券换一架相同颜色的摩托车模型．请问：至少要付多少钱，才能保证可以换到三种模型，且三种模型之间颜色互不相同？
<gadget id="calculator">14 * 5</gadget>
<output>70</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">1 - 32</gadget>
<output>-31</output>

<gadget id="calculator">70 + (-31)</gadget>
<output>39</output>

<gadget id="calculator">1 - 39</gadget>
<output>-38</output>

<gadget id="calculator">40 + (-38)</gadget>
<output>2</output>

<gadget id="calculator">70 + 1 + 2</gadget>
<output>73</output>

<gadget id="calculator">73 * 2</gadget>
<output>146</output>

<result>146</result>