Here's my estimates for my 3 adult standards.
50lb Layer pellets @$12.49 per bag = $68 per year
50lb scratch @$8 per bag = $16 per year
10lb grit $12
10lb oyster shell $12
Total = $9 per month
50lb Layer pellets @$12.49 per bag = $68 per year
50lb scratch @$8 per bag = $16 per year
10lb grit $12
10lb oyster shell $12
Total = $9 per month