Brant and Sylvia have a prime + 2.35% HELOC with a $30,000 balance on March 1 with accrued interest payable on the first of every month. They also have a savings account with a $10,000 balance on March 1 earning 0.85% payable on the first of every month. On March 18 they deposited $4,000 into the savings account. On both March 5 and March 30 they transferred $3,000 from their savings to their HELOC. Prime was initially at 3.75% but increased to 4.25% on March 22. Calculate the balance on April 1 in both the savings account and the HELOC.

Solution should be Savings Account Balance = $8,006.50; HELOC Balance = $24,000

Please justify the interest rate.