If we solve the model, we get the following values:

 Global optimal solution found.

 Objective value:               195.7265

 Extended solver steps:                4

 Total solver iterations:             27

 

                Variable           Value  

                    LUMP        195.7265  

                 BUY( A)        96.00000  

                 BUY( B)        90.00000  

             SINVEST( 1)        4.796526  

             SINVEST( 2)        5.598387  

             SINVEST( 3)        5.432322  

             SINVEST( 4)        3.259615  

             SINVEST( 5)        0.000000

             SINVEST( 6)        90.61000  

             SINVEST( 7)        81.08440  

             SINVEST( 8)        70.17778  

             SINVEST( 9)        56.83489  

            SINVEST( 10)        40.95828  

            SINVEST( 11)        22.44661  

            SINVEST( 12)       0.1944784  

            SINVEST( 13)        65.05226  

            SINVEST( 14)        34.65435  

            SINVEST( 15)       0.4052172E-01

Solution: PBOND

You have been able to cover a total future debt of $319 million with a lump payment of $195.73 million. To do this, you buy 96 A bonds, 90 B bonds, put $4.8 million into short-term investment funds and hold $10 million in cash to pay prizes in the initial period.