Stopping breastfeeding/pumping

Vanessa • Single mommy to baby Ava 05-31-16💕💜
Ok ladies, im not saying i will stop before my LO hits a year old but I am wondering when I could completely stop pumping and breastfeeding before she hits a year old and supplement with formula? At what point will she be eating enough solids that I could stop pumping and just give her formula and it not cost me an arm and a leg?