Ok, determined to work this out so I just googled...
There are apparently 214 scoops of feed per can of SMA and the can costs £7.25.
Then in the online feeding guide it says the following:
Feeding guide. Birth - 12 months.
Approx age of baby: Birth - 2 weeks: Approx. weight of baby: 3.5 kg/7 3/4 lb, Preparation for single feeds: Level scoops: 3, Cooled, freshly boiled water: 90ml/3 fl. oz. (approx.), Feeds in 24 hours: 6.
so for the period birth - 2 weeks that's 3 scoops x 6 feeds x 14 days = 252 scoops
Approx age of baby: 2 -4 weeks: Approx. weight of baby: 4.2 kg/9 1/4 lb, Preparation for single feeds: Level scoops: 4, Cooled, freshly boiled water: 120ml/4 fl. oz. (approx.), Feeds in 24 hours: 6.
so for 2-4 weeks that's 4 x 6 x 14 = 336 scoops
Approx age of baby: 2 months: Approx. weight of baby: 4.7 kg/10 1/4 lb, Preparation for single feeds: Level scoops: 5, Cooled, freshly boiled water: 150ml/5 fl. oz. (approx.), Feeds in 24 hours: 5.
so for 4 weeks - 2 months that's 5 x 5 x 30 = 750 scoops
Approx age of baby: 4 months: Approx. weight of baby: 6.5 kg/14 1/4 lb, Preparation for single feeds: Level scoops: 7, Cooled, freshly boiled water: 210ml/7 fl. oz. (approx.), Feeds in 24 hours: 5.
so for 2 months - 4 months that's 7 x 5 x 60 = 2100
Approx age of baby: 6 months: Approx. weight of baby: 7.5 kg/16 1/2 lb, Preparation for single feeds: Level scoops: 8, Cooled, freshly boiled water: 240ml/8 fl. oz. (approx.), Feeds in 24 hours: 4.
so for 4 months - 6 months that's 8 x 4 x 60 = 1920
Approx age of baby: 7-12 months: Preparation for single feeds: Level scoops: 7, Cooled, freshly boiled water: 210ml/7 fl. oz. (approx.), Feeds in 24 hours: 3.
so for the remaining 6 months + that's 7 x 3 x 182 = 3822
so that's a total of 9180 scoops, and if there are 214 scoops in a can that's 43 cans.
let's allow a couple of cans for wasted feeds and say 45 cans.
Cost of can £7.25
Total cost of formula per baby- £326.25
x 2 chrildren = £652.50.
So I am in the black! By about £325.