THERE SHALL BE a calculation BEYOND SIMPLE MULTIPLICATION on this table PLEASE EXPLAIN YOUR ANSWER

please fill out the table and give an explanation for your calculations
Item
Immediate predecessor
Duration (weeks)
No. of resources
Level of Effort (number of workers X duration of work)
Labor cost
Material cost
Total cost
A
4
2 designers @ $1600/person/week
$1000
B
A
2
2 programmers @ $1200/person/week
$2000
C
A
4
1 programmer @ $1200/week/person
$2000
D
B
6
1 testers @ $1000/week/person
$5000
E
CB
3
2 testers @ $1000/week/person
$ 2000
F
DE
3
2 integrators @ $1800/week/person
$1000
Total
$13000

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