United were always in control of the 4-1 win.
"I'm really pleased that Wayne scored and that Chicha scored two because if I get those two and Robin [van Persie] into the twenty-plus goals mark, we're definitely in business," Ferguson told MUTV.
"We picked a very strong team because we didn't want to make any slip-ups. The FA Cup is an important trophy for us this season. We haven't won it for nearly 10 years.
"The players did well and it was quite comfortable. In the first half Fulham had a lot of possession and there were a couple of squeaky moments. But all in all it was a really good performance by us."