20 tulip bulbs at $.50 each is 20*.50 $<<20*.50=10>>10.00
She planted half that amount of iris' so 20/2= <<20/2=10>>10 bulbs
10 iris bulbs at $.50 each is 10* .50 = $<<10*.50=5.00>>5.00
30 daffodil bulbs at $.50 each is 30*.50=$<<30*.50=15.00>>15.00
She planted three times that amount of crocus bulbs to 30*3 = <<30*3=90>>90 bulbs
90 crocus bulbs at $.50 = $<<90*.50=45.00>>45.00
All total, she earned 10+5+15+45 = $<<10+5+15+45=75.00>>75.00
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