AHEAD SAVING 4 3 2 1 1000 1000 1000 1000 1464.1 1331 1210 1100 5105.1 5105.1 AFTER SAVING 3 2 1 0 1000 1000 1000 1000 1331 1210 1100 1000 4641 4641 1) ONLY INTEREST S_0 1793633.782 593633.7821 S_1 1771490.155 571490.1551 2) left side of eq. 60.40198318 a 33111.49559 by ahead savings left side 61.61002284 32462.25058 IP>PP 1) S_0 65324.59188 S_1 65147.80002 2) left side of eq. 41209.43031 a 145.5977419 proof 6000000 only on interest: "5,842,754.44" "157,245.56" 6000000 IP