Tonya spent $90.00 on art supplies.  4 canvases cost $40.00 and a mixed set of paints cost 1/2 that much. She also spent $15.00 on an easel, and the rest of the money on paintbrushes. How much money did she spend on paintbrushes?
The canvases cost $40.00 and she spent half that amount on paint so she spent 40/2 = $<<40/2=20.00>>20.00 on paint
She spent $40.00 on canvases, $20.00 on paint and $15.00 on an easel so she spent 40+20+15 = $<<40+20+15=75.00>>75.00
She spent $90.00 total and her other purchases totaled $75.00 so she spent 90-75 = $<<90-75=15.00>>15.00 on paint brushes
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Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

A class composed of 12 girls and 10 boys was sent to the library for their reading class. Their teacher found out that only 5/6 of the girls and 4/5 of the boys are reading. How many students are not reading?There are 12 x 5/6 = <<12*5/6=10>>10 girls who are reading.
So, 12 - 10 = <<12-10=2>>2 girls are not reading.
There are 10 x 4/5 = <<10*4/5=8>>8 boys who are reading.
So, 10 - 8 = <<10-8=2>>2 boys are not reading.
Thus, there are a total of 2 girls + 2 boys = <<2+2=4>>4 students who are not reading.
#### 4[END]

Wynter went to her local town bike shop to buy her sister a bicycle as her birthday gift. While at the shop, Wynter counted 50 bicycles and 20 tricycles. How many wheels in total did the vehicles she saw have?The bicycles had a total of 50 bikes * 2 wheels/bike = <<50*2=100>>100 wheels.
There were 20 trikes * 3 wheels/trike = <<20*3=60>>60 wheels for the tricycles.
The total number of wheels is 100 wheels + 60 wheels = <<100+60=160>>160 wheels
#### 160[END]

Now, solve this next question in the style of the above examples:

Tonya spent $90.00 on art supplies.  4 canvases cost $40.00 and a mixed set of paints cost 1/2 that much. She also spent $15.00 on an easel, and the rest of the money on paintbrushes. How much money did she spend on paintbrushes?

### Response:
The canvases cost $40.00 and she spent half that amount on paint so she spent 40/2 = $<<40/2=20.00>>20.00 on paint
She spent $40.00 on canvases, $20.00 on paint and $15.00 on an easel so she spent 40+20+15 = $<<40+20+15=75.00>>75.00
She spent $90.00 total and her other purchases totaled $75.00 so she spent 90-75 = $<<90-75=15.00>>15.00 on paint brushes
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