(Almost) Impossible Integrals, Sums, and Series (Problem Books in Mathematics)

(Almost) Impossible Integrals, Sums, and Series (Problem Books in Mathematics)

Matematika Joyce's monthly income consists of a basic salary of
$500 and a commission of 4% on her sales for the
month. If her income is $1220 for a particular
month, find her sales for that month.

Joyce's monthly income consists of a basic salary of
$500 and a commission of 4% on her sales for the
month. If her income is $1220 for a particular
month, find her sales for that month.

Penjelasan dengan langkah-langkah:

So find the 4% of her sales first

Total income - basic salary

= 1220-500

=720

720 is equal to 4% of her sales

720/x=4/100

720/x=1/25

Do it with cross multiplication

720x25=x

x=18000$

So her sales is 18000$ for that month