Simply Interest Professional - Version 4.8h Simply Interest Professional makes it easy to do financial analysis, projections, valuation of assets, future cash flows, debt restructuring/refinancing, mortgage valuation, mark to market, sinking funds, savings planning, and pension calculations -- all these become quicker, simpler, and more reliable with Simply Interest Professional.There's even a very affordable lease versus buy/borrow analysis module available for SIPro that lets you work out your best financing options in just a few minutes