Cash Flow Plan

Hello,
I am looking for how to organize and track the cash flow to the vendor . 
For example, for the below tasks
10% advance for the supply of materials ph-1  - $5000/-  Planned date - 30th March
30% for the supply of materials for Ph-1 - $8000 , Planned date - 30th April
10% advance for the supply of materials ph-1  - $5000/-  Planned date - 15th April

These activites are defined in planning. But how to specify the cost details. Further based on the above example, I should pay to the vendor  in March - $5000, April - $13000. 
Please advise how to create cash flow table whist defining the various tasks in Planning. 

Regards,
Kishore

Thanks for the response.
But I would like to link the dates based on the planned dates instead of manually entering the dates. Similarly while monitoring if the dates are skipped, payment would also be delayed.
How to link the planned dates of task / milestones to the payment dates?

Hi,
As you suggested I have created provider order and terms. Through terms, orders, invoices, multiple payment schedule can be captured. But when we see the report under COST or FINANCIAL, the line items in the terms are not displayed.
In the resource cost repoort, A cross-tab report comprising the project name, Activity name and cost for each month is nicely available.
But for the expense report, only Project name is displayed and further only the total expense amount is mentioned. As per your example, the report shows only $18000 for Server, whereas multiple terms ($5000 , date1; $13000 - date2) is not visible.

Please let me know how to get the crosstab report (Cash flow report) based on the multiple payment terms.

Thanks....