Resolving an issue regarding shares in a partnership business

I am seeking for a Mashoora on a issue raised due to allocating shares in a partnership business among 4 best friends. The industry was clothing and capital is 400k. I shall name the business partners as A,B,C,D A is inputting 160k, and being a sleeping partner. (from London) B is inputting 160K, and at UAE. C is inputting 40K D is inputting 40K A has no roles and responsibilities. B will do the purchasing once in 3 months or once in 6 months or as the stock finishes. C and D will be conducting the daily operation and sales. The shares that was allocated considering the money and effort was, A - 20% B - 40% C - 20% D - 20% And it came in the following manner Capital Share from 400K - A 40%, B 40%, C 10%, D 10% Effort Share - A - 0%, B - 40%, C 30%, D%30 so Capital + Effort share = 40%, 80%, 40%, 40% out of 200 so out of 100 = 20,40,20,20. % so the problem that was raised, B is only doing purchasing once in 3 months or 6 months or as soon as stocks finish. C and D says Operation and Sales task are daily on going work and time consuming, so how can someone working in once in 3 months or 6 months have a greater effort share than Daily on going time consuming tasks. so they are demanding for more than purchasing or to reduce the purchasing share. so isn't it fare to go for a percentage of Capital Share from 400K - A 40%, B 40%, C 10%, D 10% Effort Share - A - 0%, B - 20%, C 40%, D% 40 so final profit/loss share will be 20%, 30%, 25%, 25% ?