The Donaldsons pay $15 per hour for babysitting. The Merck family pays $18 per hour and the Hille family pays $20 per hour for babysitting. Layla babysat for the Donaldsons for 7 hours, the Merck family for 6 hours and the Hille family for 3 hours. How many dollars did Layla earn babysitting?
Donaldsons pay $15/hour = 15*7 = $
<gadget id="calculator">15*7</gadget>
<output>105</output>
105.
The Mercks pay $18/hour = 18*6 = $
<gadget id="calculator">18*6</gadget>
<output>108</output>
108.
The Hilles pay $20/hour = 20*3 = 
<gadget id="calculator">20*3</gadget>
<output>60</output>
60.
The total amount Layla earned is 105 + 108 + 60 = 
<gadget id="calculator">105+108+60</gadget>
<output>273</output>
273.
Layla earned $273 for babysitting.

<result>273</result>