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Nice job! The secured won't grow, so unless it's your oldest by a lot, close it. Also close any other cards that aren't working for you, if you don't the extra utilization buffer.
I have two pieces of advice for you:
1) Don't apply for ANY card right now - you don't need it.
2) Close the store cards that are of no benefit. 1, (or 0) is quite frankly fine.
The above assumes most of the cards are at or near 0, since that information was not included.