Jill likes to do small jobs online.  She makes $10 a day for her first month working online, and double that per day in her second month.  Her third month she makes the same amount per day as the previous month, but only works every other day.  How much did she make over three months, assuming each month is 30 days long?
Since there are 30 days in a month and Jill makes $10 a day her first month, she makes 30*10= <<30*10=300>>300 dollars her first month.
She makes twice the amount of the previous month's $300 in her second month, so she makes 2*300=<<300*2=600>>600 dollars her second month.
She makes the same amount per day the third month, but only works half the number of days, so she makes 600/2= <<600/2=300>>300 dollars a month her third month.
In total, she makes 300+300+600= <<300+300+600=1200>>1,200 dollars
#### 1,200