Grandma Wang bought a box of 30 fruit popsicles for a total of 22.5 yuan from the cold drink wholesale department, and a box of 20 cream popsicles for a total of 17.2 yuan. When sold, cream popsicles are 1.5 yuan each, and fruit popsicles are 1.2 yuan each. Which popsicles are cheaper at wholesale prices? After selling a box of each of the two types of popsicles, how much did you earn in total?
王奶奶从冷饮批发部买回一箱水果冰棍30支，共22.5元；一箱奶油冰棍20支，共17.2元．售出时，奶油冰棍每支1.5元，水果冰棍每支1.2元．按批发价，哪种冰棍便宜？两种冰棍各卖出一箱后，一共赚了多少元？
<gadget id="calculator">22.5 / 30</gadget>
<output>0.75</output>

<gadget id="calculator">1.2 - 0.75</gadget>
<output>0.45</output>

<gadget id="calculator">0.45 * 30</gadget>
<output>13.5</output>

<gadget id="calculator">17.2 / 20</gadget>
<output>0.86</output>

<gadget id="calculator">1.5 - 0.86</gadget>
<output>0.64</output>

<gadget id="calculator">0.64 * 20</gadget>
<output>12.8</output>

<gadget id="calculator">13.5 + 12.8</gadget>
<output>26.3</output>

<result>26.3</result>