Rolls and Extensions

[Vovchik]

There is a "rolls and extensions" question in my previous post, but I would like to make it separate.

Context: FOUR HUNDRED METRIC TONS (400 MT) with Rolls and Extensions
By 12 months

The Buyers warrant with full corporate and legal responsibility and under penalty of perjury that they are ready, willing and able to purchase the quantity of 400 MT (FOUR HUNDRED METRIC TONS ) with Rlls&Extns

Everything's clear except rlls&extns

thanks so much