Lowe's, Home Depot, and Walmart all sell petunia fertilizer. The amount of nitrates in each fertilizer is 26% for Lowe's, 36% for Home Depot, and 41% for Walmart. If Bob buys 5 bags from Lowe's, 7 bags from Home Depot, and 5 bags from Walmart and mixes all the fertilize together, what is the percentage of nitrates in Bob's petunia fertilizer concotion? Hint: Think of the percentages like probabilities! Again, 4 decimal places, please.
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