trying to do a price of gold formula

I am an artist, so this is not the side of my brain that works all that well. I am trying though. I need a formula that I almost got, but i'm stuck, and would greatly appreciate any help. I realize that most can do this in their sleep, but not me.

I need to calculate the price of gold and casting for any given day. (the price of gold will be "X")

The first cell would be the price of gold per ounce. ("X")

The second cell would give me a formula that I need, here it is. X+5/31.1=/1.33 ("X" plus 5 divided by 31.1, then that sum then divided by 1.33. I can do the formula until I get to the /1.33 portion. I can't figure out how to have the sum, then have it divided by 1.33.

Then to top it off, I need to add "Y" (an additional charge per gram) to the total.

Thanks in advance