For the processing sequence R-P-S-T-Q, total tardiness is ___________

Question

Data on five products to be processed on a single machine is given below

     

Product	Release	Processing time	Due date
P	0	3	10
Q	2	4	9
R	0	2	15
S	1	5	11
T	1	1	13

            For the processing sequence R-P-S-T-Q, total tardiness is ___________.