2, 6, 18, 54, 162, 486...
Start with the number 2.

And continue with that pattern from there.
15x = 292.50
Divide 15 from both sides
X= 5.85
1 T-shirt = $5.85
45x = 747.50
Divide 45 from both sides
X= 16.61
1 T-shirt = $ 16.61
You didn’t provide a picture