extra=5
len655=material ? 696 : 655
len1265=material ? 1296 : 1265
len1570=material ? 1596 : 1570
n655=floor(sirka/(len655+extra))
n1265=floor(sirka/(len1265+extra))
n1570=floor(sirka/(len1570+extra))
use1265=(n1570<2) && (n1265>=2) ? 1 : 0
autoSizeId=use1265 ? "sz_1265" : (n1570>0 ? "sz_1570" : (n1265>0 ? "sz_1265" : "sz_655"))
autoLen=use1265 ? len1265 : (n1570>0 ? len1570 : (n1265>0 ? len1265 : len655))
autoQty=(max(1, floor(sirka/(autoLen+extra))) * multiplier) * coverCount