QAP formulation in excel

For formulation of a Quadratic Assignment Problem we need to implement

∑(i=1)^n▒∑(j=1)^n▒∑(k=1)^n▒∑(l=1)^n▒〖(X_ij.X_kl)(〖TF〗ik)(D(jl)) 〗

where Xij are the decision variables

(X_ij.X_kl) can be linearised to a variable Yijkl,but how can implement this in excel..? Can anyone please tell me how to formulate this expression ..?

Any related advice regarding tackling Quadratic Assignment Problem computationally ..?

I have already tried and solved a normal assignment problem but i could not find any way of implementing the four index variable.

I am using MS excel 2010 Thanks in advance..!