Firstly, the formula says - If your current version is set to forecast then you are bringing the data from OTH01 module or else you are bringing the data from DATA01 module.
Please check if the below 2 points are mapped or loaded with correct data:
1. SYS09 Version Details - Forecast ? line items has been set to current version.
2. OTH01 Non Employee Expenses module has been loaded with the correct data.
So, if the current version is selected as forecast from the system module then whatever data is present in OTH01 module will flow into your reporting module as per the formula into respective line items.