Question 424171
The zip code can end in 0,2,4, or 8
If it ends in 0, Then 0 is not allowed
in the 1st 4 digits, so
{{{9*8*7*6*1}}} are the possible codes
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If it ends in 2, then
{{{9*8*7*6*1}}} are possible codes
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If it ends in 4, then
{{{9*8*7*6*1}}} possible
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If it ends in 8, then
{{{9*8*7*6*1}}} possible
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Summing these:
{{{ 4*9*8*7*6*1}}}
(I can't find calculator)