Cascading values depending on dropdown selection

Hi all, I am a complete novice noob to excel, I don't even know if I am in the correct part of the forum for this post to be honest, but here goes',
can anyone help me on a formula that works like this

I have cell with drop down menu ( which I have done ) when you select an item in the menu, it puts a number in another cell,
then when that is a certain number, then another number appears in another cell e.g.

(cell E46 )"Ring gasket size R24" ( this is the item in the drop down list )(Cell H46) "Ref:10" ( this is the next cell's number ) (Cell J46) "$17.50" ( this is the number to be shown in the final cell )so would look like this :

Ring Gasket size R24 Ref: 10 $17.50

but I want the reference number and the price number to change with the change of item e.g.

Ring Gasket size R36 Ref: 23 $28.50 and so on

I was given this formula but it doesn't work.

=IF(E46='10',J46=$17.50),OR=IF(E46='23',J46=$28.50)

any ideas would be helpful this is sort of an emergency as been working on this for ages, please also bear in mind, I am a novice and do not know what I am doing 100% yet otherwise I wouldn't be here asking for you guys/gals to help, so please tread gently thanks