Where did you get this idea from?
it works with a hash just like it works with arrays
Anyway I have tried it and it works fine for me.
[% totalprice = 900 %]
[% FOREACH x IN shopping %]
[% modelname = x.key %][% information = x.value %]
[% MAKE_NAME = information.MAKE %]
Quantity: [% information.QTY %] x [% information.PRICE %]<br/>
[% ff = information.PRICE * information.QTY %]
PRICE = [% ff %]<br/>
[% totalprice = totalprice + ff %]
[% totalprice %]#print out 1000
<hr/>
[% END %]
[% totalprice %]<----- 3 -------->
It prints out 1000 as the final number not 900
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