Carter can make 6 + 5 + 8 = <<6+5+8=19>>19 cakes regularly for a week.
For this week, he made 6 x 3 = <<6*3=18>>18 cheesecakes.
He made 5 x 3 = <<5*3=15>>15 muffins.
And also made 8 x 3 = <<8*3=24>>24 red velvet cakes.
Carter was able to make 18 + 15 + 24 = <<18+15+24=57>>57 cakes for this week.
Therefore, Carter was able to make 57 - 19 = <<57-19=38>>38 more cakes for this week.
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