Better Mousetraps has developed a new trap. It can go into production for an initial investment in equipment of $$5\mathrm{.}7$ million. The equipment will be depreciated straight line over $6$ years to a value of zero, but in fact it can be sold after $6$ years for $$638,000.$ The firm believes that working capital at each date must be maintained at a level of $15\%$ of next year's forecast sales. The firm estimates production costs equal to $$1\mathrm{.}70$ per trap and believes that the traps can be sold for $$8$ each. Sales forecasts are given in the following table. The project will come to an end in $6$ years, when the trap becomes technologically obsolete. The firm's tax bracket is $35\%,$ and the required rate of return on the project is $10\%.$ Use the MACRS depreciation schedule.

$\backslash$table$[[$Year:$,0,1,2,3,4,5,6,$Thereafter$],[$Sales $($millions of traps$),0,0\mathrm{.}5,0\mathrm{.}6,0\mathrm{.}8,0\mathrm{.}8,0\mathrm{.}6,0\mathrm{.}4,0]]$

a$.$ What is project NPV$?$

Note: Negative amount should be indicated by a minus sign. Do not round intermediate calculations. Enter your answer in millions rounded to $4$ decimal places.

NPV $$

b$.$ By how much would NPV increase if the firm depreciated its investment using the $5-$year MACRS schedule? Note: Do not round intermediate calculations. Enter your answer in whole dollars not in millions.

The NPV increases by