You'll need two (2) sandbox accounts to make a mock transaction
personal & business(merchant) type
Wordpress setup
go to serbisyo.com/wp-admin
in the sidebar click theme options > payment settings > paypal settings
click enable
Paypal Setup
API Access
Log in to https://www.sandbox.paypal.com/ph/webapps/mpp/merchant using business/merchant account
once logged in, go to settings >my selling tools > API access > click update
copy the API username, pass, signature to wordpress setup
click Save Changes
Add/update business logo / customise checkout page
Log in to https://www.sandbox.paypal.com/ph/webapps/mpp/merchant using business/merchant account
Once logged in, go to Settings > Business information > Business information > click Update.
Click Add your logo to change your business logo.
Claim Money in Paypal
Log In to https://www.sandbox.paypal.com/ph/webapps/mpp/merchant using business/merchant account
click Activity (including balance & fees)
Claim the payment