Cost of 8 pencils, 5 pens and 3 erasers is Rs 111. Cost of 9 pencils, 6 pens and 5 erasers is Rs 130. Cost of 16 pencils, 11 pens and 3 erasers is Rs 221. What is the cost (in Rs) of 39 pencils, 26 pens and 13 erasers?

Cost of 4 pens, 6 note books and 9 files is Rs 305. Cost of 3 pens, 4 notebooks and 2 files is Rs 145. What is the cost (in Rs) of 5 pens, 8 notebooks and 16 files?

Cost of 4 pen, 6 note books and 9 files is Rs. 305. Cost of 3 pens,4 notebooks and 2 files is Rs. 145. What is the cost (in Rs) of 5 pens, 8 notebooks and 16 files?

If the cost of 2 pencils and 3 erasers is Rs 14. Wheras the cost of 3 pencils and 5 erasers is Rs 22, then find the cost of one pencil and one eraser

Cost of two pencils and three erasers is ₹ 18, while the cost of one pencil and two erasers is ₹ 11. Find the cost of each pencil.

If 15 pens cost Rs. 35, what is the cost of 39 pens?

The cost of 4 dozen pencils, 3 dozen pens and 2 dozen erasers is Rs. 60. The cost of 2 dozen pencils, 4 dozen pens and 6 dozen erasers is Rs. 90 whereas the cost of 6 dozen pencils, 2 dozen pens and 3 dozen erasers is Rs. 70. Find the cost of each item per dozen by using matrices.

If the cost of 30 pencils is Rs. 240, what is the cost of 18 pencils?