Pano po ba naging mas matipid kapag breastmilk?

Im living with my sister with 2 sons tpos ako 2 months plang baby boy ko. Breastfeeding ako yung ate ko formula milk since walang lumalabas na breastmilk sa kanya. Umaabot sila 6k for formula (S26) a month for dun sa 7 month old. Wala pa yung diapers and distilled water. Gastos pa sa bottles and dishwashing for bottles plus time pa na mag hugas and sterilize ng bottlea. Ako 1k a month lang for diapers. Less than pa nga minsan. But dahil pure breaatfeeding ako I had to sacrifice my career.