Brother mp-21c/cdx - Manual (Page 57)

APPENDIX
Appendix-3
Paper Output 1 sheet, face up
It is recommended that printed sheets are taken from the
paper output slot immediately after printing.
Ink Twin cartridge system: separate from the print head
Service Life of Ink Cartridge Approx. 250 page / LC03BC at 5% coverage
Approx. 150 page / LC03MY at 5% coverage