Hey guys, if I want to reference the same source cell when copying a formula
(11% is the fuel sur-charge I want to reference in my calculation), how do I
do that without manually typing the source cell in each new cell?

I tried dragging the formula, but if the first cell is =d20*a10, when I drag
it the next cell is =e20*b10. I want =e20*a10, =f20*a10, etc.

Thanks