Here are the price signs that I use at my events. I use the height range paint to change the color & really make the prices stand out.

Included are signs for: 2, 3, 5, 7, 8, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, & 60, 70, 80, 90, & 150

If you'd like to create your own and want to match these signs, the font I used is called Bubble Boddy Fat

Layer height: 0.2 2-3 walls 10-15% infill (I prefer gyroid)