The charge standard for electricity consumption in a certain district is as follows: for the part of each household’s electricity consumption not exceeding 10 kwh per month, the charge is 0.45 yuan per kwh; The part of 20 degrees is charged at 1.50 yuan per degree. In a certain month, user A pays 7.10 yuan more than user B, and user B pays 3.75 yuan more than user C. How much is the electricity bill paid by users A, B, and C? (Electricity is charged in whole degrees)
某区对用电的收费标准规定如下：每月每户用电不超过十度的部分，按每度0.45元收费；超过10度而不超过20度的部分，按每度0.80元收费；超过20度的部分，按每度1.50元收费．某月甲用户比乙用户多交电费7.10元，乙用户比丙用户多交3.75元，那么甲、乙、丙三用户共交电费多少元？(用电都按整度数收费)
<gadget id="calculator">10 * 0.45</gadget>
<output>4.5</output>

<gadget id="calculator">10 * 0.8</gadget>
<output>8</output>

<gadget id="calculator">1 * 1.5</gadget>
<output>1.5</output>

<gadget id="calculator">4.5 + 8 + 1.5</gadget>
<output>14</output>

<gadget id="calculator">3 * 0.8</gadget>
<output>2.4</output>

<gadget id="calculator">4.5 + 2.4</gadget>
<output>6.9</output>

<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<gadget id="calculator">7 * 0.45</gadget>
<output>3.15</output>

<gadget id="calculator">14 + 6.9 + 3.15</gadget>
<output>24.05</output>

<result>24.05</result>