Phyllis invested $7,500, a portion earning a simple interest rate of 4 1/5 % per year and the rest earning a rate of 4% per year. After one year the total interest earned on these investments was $...

Phyllis invested $7,500, a portion earning a simple interest rate of 4 1/5 % per year and the rest earning a rate of 4% per year. After one year the total interest earned on these investments was $312.00. How much money did she invest at each rate?

at 4 1/5 % per year $

at 4 % per year  $