public void setUpfrontCost(String upfrontCost) {
        this.upfrontCost = upfrontCost;
    }
<p>
How much purchasing this instance costs you upfront.
</p>

@param upfrontCost
       How much purchasing this instance costs you upfront.
aws-java-sdk-costoptimizationhub/src/main/java/com/amazonaws/services/costoptimizationhub/model/RdsReservedInstancesConfiguration.java