E maths {financial transaction}

1a)$3000+$2500+$2600+$2600=$10700

b)$40900+$10700=$30200

c)0.02x900=$180
0.05x21200=$1060
$1060+$180=$1240

d)1240/30200 x100 =4.105960625
=4.11%

2i)$3000+$1000+$2000+$2000+$9600=$17600

ii)$4000x12=$48000(annual income)
$48000-$17600=$30400

iii)0.12x$30400=$3648

3) relief.. $3000+$1500+$1500=$6000
$40000-$6000=$34000
0.10x10000=$1000
$34000 -$10000=$24000
0.15x$24000=$3600
$3600+$1000=$4600[income tax]