Remark If we replace A in Example 3 by A1 given by
A1 = 9
12
6
10
20
0






i e , if the clients agree to reduce their purchase orders, then
A1 B = 
3
4
0
9
12
6
7
9
3
10
20
0
5
12
7



 


 


 



  = 



141
216
78
170
220
60
Rationalised 2023-24
MATHEMATICAL MODELLING        201
This requires 311 units of R1, 436 units of R2 and 138 units of R3 which are well
below the available raw materials, i e