He has already done 264 this week because 34 + 20 + 123 + 64 + 23 = <<34+20+123+64+23=264>>264.
If he does 60 he will have done as many as last week because 324 - 264 = <<60=60>>60
He has to do 61 on Saturday because 60 + 1 = <<60+1=61>>61
#### 61