Where can I view a breakdown of how my Mari Savings Account balance and Mari Invest SavePlus holdings are used to fund my transactions?

When you enable Pay with Mari Invest SavePlus, you will see the Total Available Balance to in the relevant app pages where you perform payments and transfers.

For every transaction, you will also be shown a breakdown of the amounts used from your Mari Savings Account and Pay with Mari Invest SavePlus before and after you confirm any payment and transfers.