Does icsi have to be done with ivf....?? I'm confused!!

Ok so we got told due to hubby's low sperm count that icsi is our only option. My Gyno told me that ivf costs £12,000 where as icsi is £4,000 so it's a lot cheaper. Someone has just said u have to have icsi with ivf so that means it will be £16,000 all together!!!!!!! Is that right??? I was feeling hopeful that £4,000 isn't a lot to save up for rather than £12,000 but now I'm feeling pretty shitty about it       :-((