For Each of the Following Statements,fill in the Blank with Either

For each of the following statements,fill in the blank with either the word increase,decrease,or stay the same.
a.
All else being equal,as the sales price per unit increases,the contribution margin per unit will _________________.
b.
All else being equal,as variable costs per unit increase,the contribution margin per unit will _________________.
c.
All else being equal,as total fixed costs increase,the contribution margin per unit will ________________.
d.
All else being equal,as sales volume increases,total fixed costs will _______________.
e.
All else being equal,as sales volume increases,total variable costs will _____________.