sum more doubts came up nd needed sum help..the paper is may/june 2005, question 3 b..(how do v get the quantity..) nd part c aswell..ll be w8in 4 the answer..Thanks.. 
The limiting factor here is variable overheads, as fixed has 2 b paid.
So find da contribution to each unit overhead, & ull find bronze contributing da least of $8.3.
So the quantity will decrease,while others stay da same.
total available overheads 197000(as this remains unchanged,stated in da question)
New fixed overhead=127656(with 8% increase)
Therefor available variable overheads=197000-127656=69344
variable overhead utilized for full production except bronze=54800
Overhead remaining 4 production of Bronze=69344-54800=14544
14544/10=14544 units of bronze