anufacturer Gypsum board Gypsum R Us 8.550 78.00% 3.335 Manufacturer Combined Value of Postconsumer + 1/2 Preconsumer Content (Total Re ycled Content Value) 430,535 Combined Value of Postconsumer + 1/2 Preconsumer Content. as a Percentage of Default Total Materials 11.31% Cost (Total Percent Recycled