Template tags now support + – and * arithmetic, here is an example that is used in the “external_invoice” template:
Total: {TOTAL_AMOUNT_DUE} <br> +10: {TOTAL_AMOUNT_DUE+10} <br> 10%: {TOTAL_AMOUNT_DUE*0.10} <br> 50%: {TOTAL_AMOUNT_DUE*0.50} <br> -50: {TOTAL_AMOUNT_DUE-50} <br>
This produces the following output:
Total: $100.00 EUR +10: $110 EUR 10%: $10 EUR 50%: $50 EUR -50: $50 EUR
And for example, in the “quote_pdf” template you can use these tags:
{TOTAL_AMOUNT} {TOTAL_AMOUNT*0.10} {TOTAL_AMOUNT*0.45} {TOTAL_AMOUNT*0.45} {currency:TOTAL_AMOUNT} {currency:TOTAL_AMOUNT*0.10} {currency:TOTAL_AMOUNT*0.45} {currency:TOTAL_AMOUNT*0.45}
which gives this output:
85 8.5 38.25 38.25 $85.00 $8.50 $38.25 $38.25