Also, every time you apply purple shampoo, make sure your hair is dry so dry your hair after the bleach process.
$640? No no Ladies…use Blast bleach ($13) 3 times, each time follow with purple shampoo (1 hour), wait a month until some roots grow out, bleach second time, repeat with bleach, purple shampoo, trim hair a bit, third time- bleach (leave in hair for 45 minutes, dry hair, leave splat reconstructor in hair overnight, then on dry hair apply purple shampoo for one hour, wash and style. Viola! White purple hair for about a $100 :).