Thank-you,It make good sence ,comparing apple to apples.What had me confused is the different opinions on what high purity quartz is,some say 99.5 and up others say 99.9+,with 3n been very costly.Using 99.5 should still give HPQ a cost advantage on the raw material cost.
Keep up the great work
will we be seeing another Christmas sweater this season?
Merry Christmas to you and your loved ones.