If Statements

a spreadsheet is automatically generated from our database the number of students that have entered for each examination.

i need to add an amount to each subject and round it up to 5.

for example:

if the entry is between 100 and 105 - this would need to be rounded up to 115.

is there an if statement i could create that would do this? bearing in mind the numbers could run between 1 and 5,000.

i would appreciate any assistance that you could give me.

thanks

anne