The employees of a certain company subscribe to three magazines A, B, and C, and each person subscribes at least one. Among them, 28 people subscribe to magazine A, 41 people subscribe to magazine B, and 30 people subscribe to magazine C. At the same time, they subscribe to magazine A , 13 people subscribed to two magazines B, 14 people subscribed to both magazines B and C, 15 people subscribed to both magazines A and C, and 11 people subscribed to both magazines. So how many employees does the company have?
某公司的员工订阅A、B、C三种杂志，每人至少订一份，其中订阅杂志A的有28人，订阅杂志B的有41人，订阅杂志C的有30人，同时订阅了A，B两种杂志的有13人，同时订阅了B、C两种杂志的有14人，同时订阅了A，C两种杂志的有15人，而三种杂志都订了的有11人，那么该公司有多少员工？
<gadget id="calculator">28 + 41 + 30</gadget>
<output>99</output>

<gadget id="calculator">13 + 14 + 15</gadget>
<output>42</output>

<gadget id="calculator">99 - 42</gadget>
<output>57</output>

<gadget id="calculator">57 + 11</gadget>
<output>68</output>

<result>68</result>