The total cost of 5 pens, 7 pencils and 9 erasers is equal to twice the total cost of 2 pens, 3 pencils and 5 erasers. Consider the following statements:

1. The total cost of 4 pens, 6 pencils and 10 erasers is equal to the total cost of 5 pens, 7 pencils and 9 erasers.

2. The total cost of one pen and one pencil is equal to the cost of one eraser.

Which of the statements given above is/are correct?