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matrix manipulation and arrays manipulation

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Dear Matlab community, I apologize in advance if I may have asked too many questions as suggested by some users on here. I usually get all kind of help from bright and fantastic individuals through MathWorks. I am having some trouble getting a result that I need using two matrices with different dimensions. I attached a code with an extracted portion of these matrices to better elaborate what I am doing and hoping to achieve, I will also pasted it on here just in case:
%%%%%%Extracted 10 rows and 3 columsn from A(73400 by 30)(noting that nbr
%%%%%%or rows in A is = (14680 of (5*1) stacked) so that's why I need to
%%%%%%do the sump of the product in 5 rows at the time from A
%%%Matrix B(14680*5)
%%Objective Matrix is C(14680*30) with each element in C(i,j)= sumProduct(transpose(A(5*1).*B(i,:))
%%Example:
A1=[-20.6860046107437,-20.8259490953586,-20.5295141167041;-4.68083651024847,-4.38170600425412,-4.04039850536564;-5.32219353656980,-4.99820840303045,-4.62367652177701;0,0,0;0,0,0;-13.3475398510192,-10.9590900264805,-8.87951051472035;-0.0119489044851285,-0.00952917816601411,-0.00754907814411214;0,0,0;0,0,0;0,0,0];
B11=[2.48618841134752e-06,1.78727800000000e-06,0,0,0;2.56419915269461e-06,1.78727800000000e-06,0,0,0];
C(1,1)=sum(A1(1:5,1)'.*B11(1,:)) % 1st element in C(14680*30)
C(2,1)=sum(A1(6:10,1)'.*B11(2,:))% 2nd element in C(14680*30)
....
%%until all the 14680 of (5*1) are reached so C(14680*1)
%%now same thing needs to be done but moving in the 2nd Column of A(:,2)
C(1,2)=sum(A1(1:5,2)'.*B11(1,:)) % Still 1st row of B
C(2,2)=sum(A1(6:10,2)'.*B11(2,:))% Still 2nd row of B
%%continue until all 14680 rows and 14680 of (5*1) are used, then move to
%%next column nbr 3 from A(:,3)
C(1,3)=sum(A1(1:5,3)'.*B11(1,:)) % Still 1st row of B
C(2,3)=sum(A1(6:10,3)'.*B11(2,:))% Still 2nd row of B
%%%the final dimension of C is then (14680 by 30)
  8 Comments
Amine Ben Ayara
Amine Ben Ayara on 13 Dec 2016
@ Stephen, it is not really a duplicate. That question was somehow closed and I was told to make an example of what the operation I needed and here I attached a portion of m. script as an illustration to what I need help with. Thanks
Walter Roberson
Walter Roberson on 4 Jan 2017
It is really a duplicate. If you had new information you should have updated the previous question.

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