Calculate entitlement from multipule fields

Hi All,

I have a spread sheet that has the leave entitlement for our staff and their staff number. Some staff have multiple roles, meaning they have more than one leave entitlement. I need a formula that will add up staff entitlement from all their roles.

Please see the attached spread sheet, i have made an example of what i need to calculate.

Thank you in advance for any help you can provide.

Regards,

Luke.