Approach 2, Problem 2 [A2P2]: The micro millionaire studied his balance sheet at the end of the year with great interest. The total income from the sale of the very popular Domomicro model came to ₤1,000,000,000. What aroused his interest was not so much the total as that neither the number of micros sold nor the cost of an individual micro contained a single zero digit. How many micros were sold? [p. 23]