SBC and Area in Retaining Wall

What SBC is will do for the normal peoples who are looking towards the SBC and expecting more from your side. Please tell us about that.https://www.wedefineclean.net

Okay, for starters:

(phi) = ?;

(beta)_$ = ?;

(gamma)_$ = ?;

(gamma)_d = ?;

(gamma)_r = ?;

(psi) = ?;

(delta) = ?;

(theta) = ?;

(alpha)_o= ?;

(alpha)_i = ?;

(h)_$= ?;

(h)_s = ?;

(h)_w = ?;

(h)_c = ?;

(h)_k = ?;

(wc) = ?;

(c) = ?;

(tt)_w = ?;

(tt)_f = ?;

(tt)_k = ?;

(s)_s = ?;

(W)_beta = ?;

(w)_w = ?;

(w)_f= ?;

and most importantly,

(f)_{$ = ?.}

_{The rest of the values should be calculatable from the above inputs, without too many assumptions...}