Answer:
Stevie earns $600 on Sunday and $217.50 on Saturday. Together it is 817.50 dollars.
Explanation:
Sunday Newspaper:
36+4=40 dollars per Sunday Newspaper
40*15=600 dollars
Saturday Newspaper:
12+2.50=14.50 dollars per Saturday newspaper
14.50*15=217.50 dollars
600+217.5=817.50 dollars for 15 Sunday Newspapers and 15 Saturday Newspapers