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Month Stage Cost(Rs. '000 per man-month)
$1-2$ Specification $40$
$3-4$ Design

$20$

$5-8$ Coding

$10$

$9-10$ Testing

$15$

$11-15$ Maintenance $10$

The number of people employed in each month is:

 Month No. of people employed $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$ $11$ $12$ $13$ $14$ $15$ $2$ $3$ $4$ $3$ $4$ $5$ $5$ $4$ $4$ $1$ $3$ $3$ $1$ $1$ $1$

What is the difference in the cost between the old and the new techniques?

1. Rs. $30,000$
2. Rs. $60,000$
3. Rs. $70,000$
4. Rs. $40,000$

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