Using automatic transfers, Jacob was able to deposit $4800 last year into his saving portfolio (high-yield savings account, certificate of deposit, and cryptocurrency portfolio). Last year, his high-yield savings account earned 4.2% and his certificate of deposit returned 5.75%, but his cryptocurrency portfolio decreased 2.5% in value. If his net gain for the year was $104.50 and he had $300 more in his cryptocurrency portfolio than in his certificate of deposit, 

how much did he have in each savings vehicle? (Formulate a system of equations and solve it by utilizing the inverse matrix method.)