Is there currently a way to handle down payments on ZOHO?

I explain my problem :

• I only want to create 1 estimate and 1 invoice for each sales ;
• I want my customers to pay a down payment of 40% when they receive the invoice and the rest when the work is done ;
• I cannot find a way to have at the bottom of my invoice :
• The total amount (tax included) ;
• The total amount of the down payment (40%) ;
• The total amount of what they will have to pay at the end.
• Currently I can only display the total amount so I have to create 2 invoices every time and this is very confusing for the accountant.

Thanks,

Adrien