Last years sales at the drive in movie theater totol 144.600. this year's sales should increase by 1/3. how much should sales increase by and what will sales be in the new year? totals sales for hi  fi  electronics  were 205,000 for the week. these  sales included  a 6% sales tax. what were the actual sales? sandra insured her sandwhich shop  for 90,000 for fire. whats her insurance premiumif the rate per $100 is $0.83?

A] Given that the last years's sales was $144,600 and this years sales should increase by 1/3. Then:
i] Amount the sales should increased by will be:
(last year's sales)*(increase)
=144,600*(1/3)
=48,200

ii] The sales in the new year will be:
(last year's sales)+(increase)
=144600+48600
=$192, 800

2] Given that the sales of hifi which included 6% tax was 205,000. The actual sales was:
Actual percentage sales=100%
percentage sales after taxation=100-6=94%
thus the  actual sales was:
(100)/(94)*205,000
=218, 085.1064

3]Given that the rate per $100 is $0.83, and the insurance was for 90000, the insurance premium will be:
(total insurance) *(unit rate)/(number of units)
plugging the values we obtain:
90000*0.83/100
$747

25% increaseplus i think decrease i only know increase: ((