Hi Guido

On Sat, Oct 17, 2015 at 1:47 PM, Guido Van Hoecke <guivho@gmail.com> wrote:
> I have not found a way to specify the vector in a constant.

You can access the elements of the vector constant suggested by Eric
with Calc's subscript function:

#+CONSTANTS: vat=[1.15,1.21,1.40]

| Amount | VAT |  Total |
|--------+-----+--------|
|    100 |   1 | 115.00 |
|    100 |   2 | 121.00 |
#+TBLFM: $3 = $1 * subscr($vat, $2); %.2f