15 articles on different topics, 600 words each

We need 15 articles, 600+ words each. Each of them will be about a different topic, which will be supplied by us. We will also supply a list of keywords/keyphrases that need to be included through the text a certain number of times (this is for search engine optimization - to keep keyword density). Little (or no) investigation on each topic is necessary - topics are not technical (sunglasses, travel, furniture, moving, etc), aimed to the casual US reader. Articles will be checked for plagiarism, and timing is as important as quality (no deadline extensions can be requested). We will choose more than one writer and award separate projects to each. Thanks!