Larry started off having 150 channels from his cable company.  They took 20 channels away and replaced those with 12 channels.  He called the company and asked if he could reduce his package by 10 more channels but add the sports package which is 8 channels.  He realizes that he didn't add the supreme sports package.  He calls back and that package adds 7 more channels.  How many channels does Larry have?
How many channels did Larry have after the first change? ** He started off with 150 channels and they took 20 away and added 12 so he has 150-20+12 = <<150-20+12=142>>142 channels
How many channels does Larry have after the second change? ** He called and asked to reduce his 142 channels by 10 channels and added 8 sports channels so he now has 142-10+8 = <<142-10+8=140>>140 channels
How many channels does Larry have after the third change? ** He ordered the wrong sports package and the new one adds an additional 7 channels for a total of 140+7 = <<140+7=147>>147 channels
#### 147