기본 한달 수강기간 중 클래스를 변경할경우?

<table width="427" style="width: 320pt; border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" x:str=""> <colgroup><col width="283" style="width: 212pt; mso-width-source: userset; mso-width-alt: 9056;"> <col width="72" style="width: 54pt;" span="2"> <tbody><tr height="22" style="height: 16.5pt;"> <td width="283" height="22" class="xl65" style="border: 0px black; width: 212pt; height: 16.5pt; background-color: transparent;">예를 들어 Y/C를 가입하고 15일째 되는 날</td><td width="72" style="border: 0px black; width: 54pt; background-color: transparent;"></td><td width="72" style="border: 0px black; width: 54pt; background-color: transparent;"></td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent;">맘이 바뀌어 R/C로 변경하고 싶다면 ?</td><td style="border: 0px black; background-color: transparent;"></td><td style="border: 0px black; background-color: transparent;"></td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent; mso-ignore: colspan;" colspan="3">15일째가 첫 시작되는 날이 되어 R/C를 한달 동안 보실 수 있습니다.</td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent; mso-ignore: colspan;" colspan="2">수강료도 물론 98,000원을 입금하셔야 하구요 </td><td style="border: 0px black; background-color: transparent;"></td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent;"></td><td style="border: 0px black; background-color: transparent;"></td><td style="border: 0px black; background-color: transparent;"></td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent; mso-ignore: colspan;" colspan="2">그러면 Y/C 수강하다가 남은 15일은 어떻게 되냐구요?</td><td style="border: 0px black; background-color: transparent;"></td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent; mso-ignore: colspan;" colspan="2">R/C 한달 수강기간이 끝나면 다시 Y/C로 등급이 변경되어</td><td style="border: 0px black; background-color: transparent;"></td></tr><tr height="22" style="height: 16.5pt;"><td height="22" class="xl65" style="border: 0px black; height: 16.5pt; background-color: transparent;">남은 15일을 수강하실 수 있습니다.   </td><td style="border: 0px black; background-color: transparent;"></td><td style="border: 0px black; background-color: transparent;"></td> </tr> </tbody></table>