Returning only positive values from a function

[Ceves]

Hello
I am trying to prepare a simple spreadsheet to illustrate sales
commissions. My problem is i want to compare a list of sales to target
sales, and calculate a stepped commission.
i.e. for all sales over $1000-2000, a commission of 2% is paid. all
sales over $2000 receive a 3% commission. Easy to do manually, but it
gets messed up when the sale is less than $1000.

 

[Infinity]

=If(A1<1000,A1*2%,A1*3%)

If there is more you may want to create a table and use the looku
function.