Represent the following as a system of linear equations, then solve.
A manufacturer wishes to make 2,500 kg of a new product, which is a mixture of two different ingredients. One ingredient costs $1.4 per kg, the other in gredient costs $3.7 per kg. The new product costs a total of $2.4 per kg.
How many kilograms of each ingredient should be used to make 2,500 kg of the new product?