Gome Mall sells three different models of mobile phones, A, B, and C. The unit price of A is the sum of B and C (1/3), the ratio of the unit price of B to the sum of A and C is 1:4, and the unit price of C is 1100 yuan , How much is the total income of the three mobile phones?
国美商场卖出甲、乙、丙三部不同型号的手机，甲的单价是乙丙和的(1/3)，乙的单价与甲丙和的比是1：4，丙的单价是1100元，三部手机一共收入多少元？
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">1_100 / (11/20)</gadget>
<output>2_000</output>

<result>2_000</result>