What should be the ideal amount of feed for 20 days old baby boy with weight 3 kgs, being fed entirely on NESTLÉ NAN PRO1 as breast milk is too less?

Infant feeding. There is not set amount of formula to feed and infant, You should maximize your breast feeding first then offer 1-2 ounces of formula after the breast feeding. The baby should be feeding every 2-3 hours and if feeding more frequently is probably not satisfied.