Consider the transportation problem in the data set and optimal solution below.
Calculate improvement indices on each empty cell. Is this solution optimal? 
Definitions:
Expected Return
The forecasted amount of profit or loss from an investment over a specific period.
Nondeductible Contributions
are contributions made to certain retirement accounts or plans that cannot be deducted from the taxpayer's income.
Taxable Portion
The segment of income, withdrawals, or distributions subject to taxation, after accounting for exemptions, deductions, or pre-tax contributions.
IRA
Individual Retirement Account, a saving tool for individuals to allocate funds for retirement, offering tax advantages.
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