YouTube So Food Handler Envisioning & Setting ". Cha- eBook Calculator Year Turbines $280,000 280,000 280,000 280,000 Equipment 300,000 300,000 300,000 300,000 4 The wind turbines require an investment of $887,600, while the biofuel equipment requires a either project. Present Value of an Annuity of $1 at Compound Interest Year 6% 10% 12% 15% 20% 1 0.943 0.909 0.893 0.870 0.833