On March $1,2024,$ Len Horvat receives a $$100,000$ loan from his employer. The loan bears interest at $1\%$ per year. The interest is payable monthly. The principal is repayable at the end of five years. Len uses $$90,000$ of the loan toward the purchase of his home. He uses the remaining $$10,000$ to purchase investments. Assume the prescribed interest rates for $2024$ are $4\%$ for the first quarter and $5\%$ for the remainder of the year.

Determine the amount to be included in Len's employment income for tax purposes for $2024.$