 
<translate> Maci ya biya 10 * $ 0.10 = $ 1 don alkalami na blue. Kowane fensir ja yana biyan 2 * $ 0.10 = $ 0.20. Ta biya 15 * $ 0.20 = $ 3.00 don fensir ja. Don ta sayi dukan alkalami da take bukata, Maci ta biya dala uku da dala ɗaya, wato dala huɗu. <eng> Maci pays 10 * $0.10 = $1 for the blue pens. Each red pen costs 2 * $0.10 = $0.20. She pays 15 * $0.20 = $3.00 for the red pens. To buy all the pens she needs, Maci pays $3 + $1 = $4. 