I have two objects one being a custom object "leads" and the other one being a default one "accounts". I would like to create a button to transfer files from Leads to Accounts and vice versa. Any tips and help would be appreciated thank you!

Hi Everyone,

I am using the developer edition and my question is regarding adding multiple If statements to formulas within an object. 

I am trying to write a formula to assign a value to certain feilds so I can create a score for each account and rate them base on the score.
For example, one of the creiteria for the score is a feild name, "Number of properties" which happens to be 30 I want to assign a score of 25.
using if :  IF(logical_test, value_if_true, value_if_false) 
Heres what i got so far: 
IF((number_of_property__c <= 5), 5, 0)
IF((5 < number_of_property__c) <= 10), 10, 0)
IF((10 < number_of_property__c) <= 20),15, 0)
IF((20 < number_of_property__c) <= 30),20, 0)
IF((30 < number_of_property__c)),25, 0)

i keep getting a "Error: Syntax error. Extra IF" on the second IF on line 2

if there is a better way to do this or if you know why im getting this error please let me know anything helps