Which of the following options is in decreasing order of raw materials cost per kurta?

Profit  = selling price - raw materials cost - selling cost - labor cost 

Hence, raw materials cost = selling price - profit - selling cost - labor cost 

A worker takes 2 hour to produce a kurta.

Labor cost for Kurta = 2 * (Labor cost/ hour)

Raw materials cost per Kurta

for factory 2,    5300-800-45-400*2 = 3655

for factory 3,    5800-900-60-550*2 = 3740

for factory 4,    5500-800-68-450*2 = 3732

for factory 5,    5400-600-75-600*2 = 3525

for factory 6,    6000-875-65-400*2 = 4260

for factory 7,    4900-500-85-350*2 = 3615

for factory 8,    5300-600-70-420*2 = 3790