Xiao Ao applied for two companies after graduating from university, both required to sign a five-year contract, with an annual salary of 20,000 yuan at the beginning, but the two companies raised their salary in different ways. Company A promises to raise salary by 1,000 yuan every year, and company B promises to raise salary by 300 yuan every six months. After five years like this, which company has higher income? How high is it?
小奥大学毕业后应聘了两家公司，都要求签五年的合同，年薪开始都是二万元，但两家公司加薪的方式不同．甲公司承诺每年加薪1000元，乙公司答应每半年加薪300元．这样五年下来，哪家公司收入更高？高多少？
<gadget id="calculator">20_000 * 5</gadget>
<output>100_000</output>

<gadget id="calculator">1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10</gadget>
<output>55</output>

<gadget id="calculator">300 * 55</gadget>
<output>16_500</output>

<gadget id="calculator">100_000 + 16_500</gadget>
<output>116_500</output>

<gadget id="calculator">1 + 2 + 3 + 4 + 5</gadget>
<output>15</output>

<gadget id="calculator">1_000 * 15</gadget>
<output>15_000</output>

<gadget id="calculator">100_000 + 15_000</gadget>
<output>115_000</output>

<gadget id="calculator">116_500 - 115_000</gadget>
<output>1_500</output>

<result>1_500</result>