Ingredients$-$At$-$Home $($IAH$)$ is an increasingly popular grocery delivery service that delivers fresh ingredients sourced from local farms to your doorstep. The company has experienced significant growth since its successful IPO seven years ago. The company has also followed a consistent strategy of paying out exactly $50\%$ of its net income to its shareholders in the form of an annual dividend. The following table contains some information about IAH for $2015$ to $2017,$ and some further limited information for $2014.$ Assets $($book value$),$ Shareholders equity $($book value$),$ Sales Revenue, and Net Income are stated in thousands of pounds $().$

$2014201520162017$

Assets $385249805870$

Shareholders' Equity $1193139215841730$

Sales Revenue $137641710420613$

Net Income $398383291$

Sales Growth Rate $0\mathrm{.}30\mathrm{.}240\mathrm{.}21$

Compute the sustainable growth rate for IAH for $2015,2016,$ and $2017,$ and compare it to the actual sales growth rate. Comment briefly on your findings. If you find that the company is growing too fast or two slowly, please propose the simplest possible remedy $($involving as little change to the company$$s operations as possible$).$