Formula Fields in Zoho CRM - Calculating a sum

Formula Fields in Zoho CRM - Calculating a sum

Hi, 
I need to create a formula field which shows the total of what the Unit Price is + 45%. The total amount of this calculation is what I need to be populated in the field. I cannot seem to be able to do this. 

Do you need to calculate between 2 fields in CRM? Can I not create a field to show the total calculation of an amount + a fixed percentage?

Many Thanks
Hayley