How do I reshape my data so that rows are columns in R?

I have a dataset that contains the following values

       Item Number  Sales in Dollars
1          50           10                   
2          50           15
3          60           20
4          60           30
5          70           35
6          70           45

I would like to reshape the data such that the result would be

       50  60 70
1      10  20 35                        
2      15  30 45

How could I go about achieving this?

>Solution :

We could use pivot_wider:
The trick is to group_by and create an id in the the group to get this output, otherwise you will get a list with NAs

library(dplyr)
library(tidyr)

df %>% 
  group_by(ItemNumber) %>% 
  mutate(id = row_number()) %>% 
  pivot_wider(names_from=ItemNumber, values_from = SalesinDollars) %>% 
  select(-id)

   `50`  `60`  `70`
  <int> <int> <int>
1    10    20    35
2    15    30    45