Watercolor: Simple, beautiful, done on fine cotton paper. ($7/linear inch)
   - (a 4x6 size paper) 4+6 inches would be 10" x $7 = $70
  - 8+11 = 19" x $7 = $133
  - 12+16 = 28" x $7 = $196
  - 16+20= 36" x $7 = $252

Acrylic: Has the timelessness of oil and is done on stretched canvas, not so rough as watercolor. Fine detail. ($15.00/linear inch)
   - 4+6 inches would be $10 x $15 = $285  
  - 8+11 = 19" x $15 = $285  
  - 12+16 = 28"  x $15 = $420  
  - 16+20 = 36" x $15 = $540

Oil: Timeless! Great detail. Exquisitely done ($17.50/linear inch)
  - 4+6 = 10" x $17.50 = $175  
  - 8+11 = 19" x $17.50 = $332.50  
  - 12+16 = 28" x $17.50 = $490  
  - 16+20= 36"x $17.50 = $630