The students at Midtown Middle school sold flowers as a fundraiser in September and October.

September price = S

October price = 1.2S = $1.5  so September price S = $1.5/1.2 = $1.25

Money earned in September = 0.4*900*$1.25 = $450

Money earned in October = 0.4*700*$1.5 = $420

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Can anyone help me?

a. $${\mathtt{1.5}}{\mathtt{\,\times\,}}{\mathtt{0.2}} = {\frac{{\mathtt{3}}}{{\mathtt{10}}}} = {\mathtt{0.3}}$$

0.30+1.50=1.80

The price was $1.80

b.More in September because they sold more

$${\mathtt{900}}{\mathtt{\,\times\,}}{\mathtt{0.4}} = {\mathtt{360}}$$

They earned $360 in September

$${\mathtt{700}}{\mathtt{\,\times\,}}{\mathtt{0.4}} = {\mathtt{280}}$$

They earned $280 in October

360-280=80

They earned $80 more in September than October