How much money are purple and pink sewing threads?

Spools of thread vary by length and brand. Generally, sewing thread is about 1 cent per yard. So, a spool of 250 yards would be $2.50, or a spool of 500 yards is about $5.00. The greater the yardage, the better deal you'll get. A spool of 1,000 yards is usually closer to $8.00.