On Tuesday, she brings in 1 + 1 = <<1+1=2>>2 muffins.
On Wednesday, she brings in 2 + 1 = <<2+1=3>>3 muffins.
On Thursday, she brings in 3 + 1 = <<3+1=4>>4 muffins.
On Friday, she brings in 4 + 1 = <<4+1=5>>5 muffins.
In total, she brought 1 + 2 + 3 +4 + 5 = <<1+2+3+4+5=15>>15 muffins to school to share with her friends.
She baked a total of 15 + 7 = <<15+7=22>>22 muffins.
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