How long will my box last?

 Weight  Feed daily 4.5 kg box lasts 9 kg box lasts
(kg) (cups) approx. (days) approx. (days)

2.5

1/2

72

144

5

3/4

48

96

10

1 1/4

29

58

15

1 1/2

24

48

20

2

18

36

25

2 1/4

16

32

30

2 1/2

14

29

35

3

12

24

40

3 1/4

11

22

45

3 1/2

10

21

50

3 3/4

9

19