Taipei, Taiwan (AP) - Diners tempted to lick a plate after a delicious meal can now go a step further - eat the plate.
Chen Liang-erh, 50, an amateur inventor, announced Friday that he had  perfected an edible plate made from wheat grain, and that he planned to  mass-produce it and other edible crockery including cups, bowls and food  containers.
Chen spent six years developing the plate, which he said would retail at about 7 cents each.
Diners who don't want to eat the items - which taste like unsalted  popcorn - can boil them for a nutritious meal for animals, he said.
Chen said this can help reduce pollution caused by discarded crockery.   The only disadvantage, he said, is his crockery cannot be washed and  reused.
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Purchasing power of burgers
          Cologne, May 27 dpa -  The U.S. dollar is undervalued against the  Deutsch-mark based on how many "Big Mac" hamburger sandwiches the two  currencies can purchase, said one of Germany's leading institutes.
The Institute of the German Economy (IW) in Cologne noted that the  popular sandwich by the McDonald's restaurant chain is increasingly  being used by economists around the world as a measure of currencies'  relative purchasing power.
The institute said that currency exchange rates are often unreliable as  an instrument to measure purchasing power.  At the same time, "baskets"  of products used to arrive at comparative purchasing power are  complicated to compile.
A simple alternative, now that McDonald's has spread to virtually every  country on earth, has become to look at what a Big Mac costs, the IW  said.
"A particularly hungry American can buy five Big Macs for 11 dollars.   If he exchanged the money into Deutsch-marks, his 18 marks in Germany  can just barely obtain four Big Macs," the IW said.
Conclusion: based on the Big Mac index, the dollar is undervalued, the institute said.
Americans can get their best Big Mac buy these days in Moscow, where one sandwich costs only about 59 cents.
But Russians must "work nearly two days in order to afford this meaty  capitalist achievement - longer than people in any other country", the  IW said.