Fixed costs and variable costs

Dear John/ Gromit,

I’m struggling a bit with basics on cost classifications and marginal costing. I have seen questions which regularly test these in past exam papers and I need a bit of refresh from F2.
Could you please suggest which lectures from F2 will help me with these basics?

Will the first two lectures – Cost classification part a and b suffice or do you recommend any others?

Thanks for your help.

Alefiyah