A factory produces a product (measured in cubic feet) over seven days as per the following schedule:
| Day 1 |
Day 2 |
Day 3 |
Day 4 |
Day 5 |
Day 6 |
Day 7 |
| 150 |
180 |
120 |
250 |
160 |
120 |
150 |
The finished goods are to be transported to the market by a truck having a capacity of 200 cubic feet. Any finished goods (ready at the end of the day) retained overnight at the factory will incur a storage cost of Rs. 5 per cubic foot for each night of storage. The hiring cost for the truck is Rs. 100 per day.
If the storage cost reduces to Rs. 0.80 per cubic foot per night, the truck should operate on
- 2nd, 4th, 6th and 7th days
- only the 7th day
- 2nd, 4th, 5th and 7th days
- None of the above