Girls, who are on mixed feeding? How is it organized for you? Do you f…

Girls, who are on mixed feeding? How is it organized for you? Do you feed equal portions? Are the time intervals equal? My little one, when she goes to bed, if I give her formula, she gets fussy and then it's hard to put her down. And she cries and doesn't take the breast (I tried giving her some more for calming after the formula). So I'm thinking of not giving formula at night, but I'm afraid because of weight gain. When I give her formula well and responsibly, she gains about 100 grams in two days. As soon as I stop waking her up for feedings, the weight stays three days, and sometimes even decreases. I don't