In the implementation part of LEED reference guide it is writen that buying a toner from a cartridge remanufacturer or an equipment supplier that will take spent cartriges back is considered a sust

The project I am working for does not pay for any toner cartridges as they are included in the maintenance contract.

Might seem obvious, but would soy-based inks qualify as rapidly renewable? I haven't seen mention of this anywhere.

The LEED certified building that I work in is a sports arena.

In the credit language above, and corresponding LEED User calculator resource states manufacturing and distribution should be within 500 miles of the project, but my LEED EBOM v4 book from LEED say

In some of our current EB:O&M projects we have considered pursuing the MRc1 and MRc3 purchasing credits, claiming credit for FSC certified materials.

In the Reference Guide on page 254 in Table 1.