Respuesta :
The most cost effective way to purchase 1000 sheets is 500 sheets at a time for $1,500.
The cost of buying 1000 sheet by different method is
(a) Hundred sheet at $500, =10×$500=$5000
(b) 200 sheet at $1000, =5×$1000=$5000
(c) 500 sheet at $1500, =2×$1500=$3000
(d) 1000 sheet at $3500, =1×$3500=$3500
Therefore the most cost effective way to purchase 1000 sheets is 500 sheets at a time for $1,500.