It has been a long while since doing big nested if's

I have supplied a lengthy question with actual values.

I have the following formula:

=IF(F36="",(((E31*$J$7)/52)*$J$8),(((E31*$J$7)/52)*F36))

F36 is an overirde number, if left blank then will execute with master
number on top of page but if I enter number (override) to f36 then uses f36
instead of master number in j8.

The 2ND and new override is a whole number that if placed in cell H36 will
replace the following portion of the formula:

((E31*$J$7)/52) - this yields 511

F36 = €œblank€� (for this example)
E31= 1300
$J$7=20.5
$J$8=18

I am overriding a 1 week budget of 511 with a number like 470 for example
with my overall goal to keep the original formula intack because it changes
and then add this new variable over top of it.

Hey thanks for your suggestions and time and have a happy holiday.

Todd Frisch